Información del autor
Autor Hernando Grande, Antonio |
Documentos disponibles escritos por este autor (72)
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Marín Palacios, Pilar ; Aragon, A.M ; Lieblich, M. ; Garcia Escorial, A. ; Crespo del Arco, Patricia ; Hernando Grande, Antonio | American Institute of Physics | 2012-07Magnetization curves of mixed Nb and FeSi based micrometric particles have been analyzed. The influence of the dispersion of Nb particles on the mixture remanence and coercivity has been studied above and below the Nb superconducting critical t[...]texto impreso
Herrero Gómez, Carlos ; Marín Palacios, Pilar ; Hernando Grande, Antonio | American Institute of Physics | 2013-09-30In the present paper, we report a systematic study of the magnetoelastic resonance of amorphous magnetic microwires of composition Fe73Si11B13Nb3. The study was performed for samples annealed at different temperatures. It was observed that such [...]texto impreso
Marín Palacios, María Pilar ; Aragón, A. M ; Garcia Escoria, A. ; Lieblich, M. ; Crespo del Arco, Patricia ; Hernando Grande, Antonio | American Institute of Physics | 2013-01-28Fe_(73.5)Si_(13.5)B_9Nb_3Cu_1 powder particles have been obtained by gas atomization. Magnetization curves and coercivity were studied for particles ranging in size up to 1000?. The overall magnetic behavior of such material is consequence of c[...]texto impreso
Morales Casero, Irene ; Archilla Sanz, Diego ; Presa Muñoz del Toro, Patricia de la ; Hernando Grande, Antonio ; Marín Palacios, María Pilar | Nature Publishing Group | 2020-01-17It is well stablished that heating efficiency of magnetic nanoparticles under radiofrequency fields is due to the hysteresis power losses. In the case of microwires (MWs), it is not clear at all since they undergo non-coherent reversal mechanism[...]texto impreso
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Hernando Grande, Antonio ; Garcia, M.A. ; Gálvez Alonso, Fernando ; Guinea, F. | Elsevier | 2020-04-15It is shown that magnetic forces as the force -/+ mu(V) over barB, exerted on electron spins at rest, account for both the transverse spin imbalance typical of spin Hall effect and the transverse charge imbalance associated with pure spin curren[...]texto impreso
Martínez, A. ; Spottorno Giner, Jorge ; Figueroa, A. ; Bartolome, F. ; Garcia, L. M. ; Prestipino, C. ; Hernando Grande, Antonio ; Crespo del Arco, Patricia | American Physical Society | 2010-07-14Amorphous metastable alloy of nominal composition [Fe_(0.5)Cu_(0.5)]_(87)Zr_(13) has been synthesized by high-energy ball milling. The alloy exhibit a ferromagnetic behavior with a Curie Temperature of T_(C)=255 K, as determined from low-field m[...]texto impreso
Cobos, M.A. ; Presa Muñoz del Toro, Patricia de la ; Llorente, I. ; Garcia Escorial, A. ; Hernando Grande, Antonio ; Jiménez, J.A. | Elsevier Science | 2020-12-30Synthesis and processing methods can have a significant influence on the physical properties of spinel zinc ferrite since it can produce microstructures characterized by different microstructural parameter such as the arrangement of the ions, la[...]texto impreso
Navarro, I. ; Pulido, E. ; Crespo del Arco, Patricia ; Hernando Grande, Antonio | American Institute of Physics | 1993-03-15It is shown that the presence of highly anisotropic magnetic precipitates in a soft multiphased matrix can produce a remarkable hardening, even when the volume fraction of the precipitates is small. The exchange coupling between the matrix and t[...]texto impreso
Hernando Grande, Antonio ; García, Miguel A. ; Soto León, Vanesa ; Alonso Bonilla, Carlos ; Aguilar, Juan ; Oliviero, Antonio | Frontiers Media | 2020-05-19Static magnetic fields have been shown to induce effects on the human brain. Different experiments seem to support the idea that moderate static magnetic field can exert some influence on the gating processes of the membrane channels. In this ar[...]texto impreso
Ovejero, Jesús G. ; Mayoral, A. ; Cañete, M. ; García, M. ; Hernando Grande, Antonio ; Herrasti, P. | American Scientific Publishers | 2019-04In this study, we evaluate the magnetic properties and cytotoxic effect of magnetic nanoparticles (MNPs) based on magnetite and Mn, Co and Ni ferrites, obtained by electrochemical synthesis. These nanoparticles have almost spherical shape and an[...]texto impreso
Guerrero, Estefania ; Muñoz Márquez, Miguel ; Fernández Pinel, Enrique ; Crespo del Arco, Patricia ; Hernando Grande, Antonio ; Fernández, Asunción | Springer | 2008Gold nanoparticles (NPs) have been stabilized with a variety of thiol-containing molecules in order to change their chemical and physical properties; among the possible capping systems, alkane chains with different lengths, a carboxylic acid and[...]texto impreso
ailoring the structure of nanocrystalline microstructures is an important step toward controlled design of novel nanostructured materials and devices. We demonstrate how the nanocrystalline microstructure of Co-rich ribbons can be tuned by annea[...]texto impreso
Hernando Grande, Antonio ; Crespo del Arco, Patricia ; García, M. A. | American Physical Society | 2006-03-03texto impreso
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Guerrero, E. ; Rojas, T. C ; Multigner, M. ; Crespo del Arco, Patricia ; Muñoz Márquez, M. A. ; García, M. A. ; Hernando Grande, Antonio ; Fernández, A. | Pergamon-Elsevier Science Ltd | 2007-03In the present paper, we show an exhaustive microstructural characterization of thiol-capped gold nanoparticles (NPs) with two different average particle sizes. These samples are compared with the polymer-like Au(I) phase formed as a precursor d[...]texto impreso
Ovejero, Jesús G. ; Godinho, Vanda ; Lacroix, Bertrand ; García, Miguel A. ; Hernando Grande, Antonio ; Fernández, Asunción | Elsevier Science | 2019-06-05In this paper Co/CoO thick layers (hundreds of nanometers) of different porosity and oxidation degree were prepared in a magnetron sputtering deposition process by tailoring the DC sputtering power, as well as the process gas and target composit[...]texto impreso
Crespo del Arco, Patricia ; Hernando Grande, Antonio ; Garcia Escorial, A. ; Kemner, K.M. ; Harris, V. J. | American Institute of Physics | 1994-11-15The local structure and chemistry of a ferromagnetic fcc-Fe_50Cu_50 solid solution obtained through high-energy ball milling were measured before and after heat-treatment-induced decomposition using extended x-ray-absorption fine-structure measu[...]texto impreso
Crespo del Arco, Patricia ; García, M. A. ; Fernandez Pinel, E. ; Multigner, M. ; Alcántara, D. ; De la Fuente, J. M. ; Penadés, S. ; Hernando Grande, Antonio | American Physical Society | 2006-10-27In this Letter, we report on a crucial experiment showing that magnetic impurities reduce the ferromagnetic order temperature in thiol-capped Au glyconanoparticles (GNPs). The spontaneous magnetization of AuFe GNPs exhibits a fast decrease with [...]texto impreso
Quesada, A. ; García, M. A. ; Andrés, M. ; Hernando Grande, Antonio ; Fernandez, J. F. ; Caballero, A. C. ; Martín González, M. S. ; Briones, F. | American Institute of Physics | 2006-12The origin of ferromagnetism in diluted magnetic semiconductors is still an open question, yielding a great deal of research across the world. This work focuses on the Co-Zn-O system. Room-temperature ferromagnetism is observed after a partial r[...]texto impreso
Sampedro, B. ; Crespo del Arco, Patricia ; Hernando Grande, Antonio ; Litran, R. ; Sánchez López, J. C. ; López Cartes, C. ; Fernández, A. ; Ramírez, J. ; Gónzalez Calbet, J. ; Vallet, M. | American Physical Society | 2003-12-05The onset of ferromagnetism has been experimentally observed in small Pd particles of average diameter 2.4 nm. High-resolution studies reveal that a high percentage of the fcc particle exhibits single and multiple twinning boundaries. The sponta[...]texto impreso
Crespo del Arco, Patricia ; Multigner, M. ; Castaño, F. J. ; Casero, R. ; Hernando Grande, Antonio | American Physical Society | 2000-06-01In this paper, the production of FeCu-based FeCuZr amorphous alloys by ball milling is reported. The thermal dependence of magnetization for the [Fe_(0.5)Cu_(0.5)]_85Zr_(15) (at. %) amorphous alloy has been found to show a dramatic field depende[...]texto impreso
Ruiz Gómez, Sandra ; Serrano, A. ; Carabias,, I. ; Garc?a, M. A. ; Hernando Grande, Antonio ; Mascaraque Susunaga, Arantzazu ; Pérez García, Lucas ; González Barrio, Miguel Ángel ; Rodríguez de la Fuente, Óscar | American Institute of Physics | 2017-02-27We have used a low-energy ion bombardment to fabricate an epitaxial single-crystalline magnetite/hematite bilayer grown on Au(111). This non-conventional fabrication method involves the transformation of the upper layers of a single-crystalline [...]texto impreso
Hernando Grande, Antonio ; Ayuela, A. ; Crespo del Arco, Patricia ; Echenique, P. M. | IOP Publishing | 2014The presence of giant diamagnetism in Au nanorods, NRs, is shown to be a possible consequence of field induced currents in the surface electrons. The distance, ?, between quantum surface energy levels has been calculated as a function of the NRs[...]texto impreso
Hernando Grande, Antonio ; Crespo del Arco, Patricia ; García, M. A. ; Fernandez Pinel, E. ; De la Venta,1, J ; Fernández, A. ; Penadés, S. | American Physical Society | 2006-08It has been observed for palladium and gold nanoparticles that the magnetic moment at a constant applied field does not change with temperature over the range comprised between 5 and 300 K. These samples, with sizes smaller than 2.5 nm, exhibit [...]texto impreso
Morales Casero, Irene ; Hernando Grande, Antonio ; Presa Muñoz del Toro, Patricia de la ; Costo Cámara, Rocío ; Mille, Nicolas ; Bezerra Da Silva, Gustavo ; Carrey, Julian | MDPI | 2018-12In order to understand the properties involved in the heating performance of magnetic nanoparticles during hyperthermia treatments, a systematic study of different gamma-Fe_2O_3 and Fe_3O_4 nanoparticles has been done. High-frequency hysteresis [...]texto impreso
Marín Palacios, María Pilar ; Marcos, M. ; Hernando Grande, Antonio | American Institute of Physics | 2010-06-28In this letter, we report the experimental work carried out to study and improve the magnetomechanical coupling on magnetic microwires. A good magnetoelastic response, with magnetoelastic coupling factor k=0.43, has been obtained by control of b[...]texto impreso
Palacios, S: L. ; Iglesias, R. ; Martínez Blanco, D. ; Gorria, P. ; Pérez, M. J. ; Blanco, J. A. ; Hernando Grande, Antonio ; Schwarz, K. | American Physical Society | 2005-11High-temperature magnetization and neutron diffraction measurements on metastable Fe_xCu_(100-x) solid solutions have recently shown to imply that ?-Fe precipitates present ferromagnetic anti-Invar behavior. For this reason, we have studied the [...]texto impreso
Gorria, Pedro ; Martínez Blanco, David ; Blanco, Jesús A. ; Pérez, María José ; Hernando Grande, Antonio ; Fernández Barquín, luis ; Smith, Ronald I. | American Physical Society | 2005-07Experimental results of magnetization and neutron diffraction in the temperature range 300-1100 K evidence an anomalous high-temperature irreversible magnetic behavior on metastable FeCu solid solutions. When the temperature is increased above 5[...]texto impreso
Ovejero, Jesús G. ; Morales, Irene ; Presa Muñoz del Toro, Patricia de la ; Mille, Nicolas ; Carrey, Julian ; García, Miguel A. ; Hernando Grande, Antonio ; Herrasti, Paloma | Royal Society of Chemestry | 2018-08-24The present manuscript reports the use of hybrid magneto-plasmonic nanoparticles (HMPNPs) based on iron oxide nanoparticles and Au nanorods as colloidal nanoheaters. The individual synthesis of the magnetic and plasmonic components allowed optim[...]texto impreso
Crespo del Arco, Patricia ; Marín, P. ; Hernando Grande, Antonio | American Institute of Physics | 2000-05-01We present experimental results on the hysteresis and relaxation of Fe/Ba hexaferrite composite samples prepared by ball milling starting from precursor Fe and Ba hexaferrite particles. Our results show that, for maximum applied fields of up to [...]texto impreso
Prados, C. ; Crespo del Arco, Patricia ; González, J. M. ; Hernando Grande, Antonio ; Marcos, J. F. ; Gancedo, R. ; Grobert, N. ; Terrones, M. ; Walton, R. M. ; Kroto, H. W. | American Physical Society | 2002-03-15The phase distribution of high aspect ratio, Fe-filled carbon nanotubes prepared by pyrolyzing a mixture of powered ferrocene and C_(60) has been determined by means of Mössbauer spectroscopy. Our results for that characterization are closely re[...]texto impreso
Arteaga Cardona, F. ; Rojas Rojas, K. ; Méndez Rojas, M. A. ; Hernando Grande, Antonio ; Presa Muñoz del Toro, Patricia de la | Elsevier Science SA | 2016-04-05Recently, potential applications of the magnetic heating for heterogeneous catalysis or organic synthesis have been reported. As these new applications are not limited by biocompatibility requirements, a wide range of possibilities for non-aqueo[...]texto impreso
García, M. A.. ; Ruiz González, M. L. ; Quesada, A. ; González Calbet, J. M. ; Hernando Grande, Antonio | American Physical Society | 2005-06-03In this Letter, we experimentally show that the room temperature ferromagnetism in the Mn-Zn-O system recently observed is associated with the coexistence of Mn^(3+) and Mn^(4+) via a double-exchange mechanism. The presence of the ZnO around MnO[...]texto impreso
Santamaría Sánchez-Barriga, Jacobo ; Lucas, M. ; Radu, F. ; Martín, E. ; Multigner, M. ; Marín Palacios, Pilar ; Hernando Grande, Antonio ; Rivero, G. | American Physical Society | 2009-11We report on the magnetic properties and the crystallographic structure of the cobalt nanowire arrays as a function of their nanoscale dimensions. X-ray diffraction measurements show the appearance of an in-plane hcp-Co phase for nanowires with [...]texto impreso
Gorria, Pedro ; Martínez Blanco, David ; Blanco, Jesús A. ; Hernando Grande, Antonio ; Garitaonandia, José S. ; Fernández Barquín, luis ; Campo, Javier ; Smith, Ronald I. | American Physical Society | 2004-06Both Cu and Fe metals, with face-centered cubic (fcc) crystal structures, are nonmagnetic. However, the substitution of Cu atoms by Fe in the fcc-Cu lattice leads to the formation of a random solid solution and the appearance of ferromagnetic or[...]texto impreso
Presa Muñoz del Toro, Patricia de la ; Rueda, T. ; Morales, M. P. ; Hernando Grande, Antonio | IEEE-Institute of Electrical and Electronics Engineers | 2008-11In this work, we present the magnetic properties of gold-coated FePt nanoparticles and the study of stable aqueous dispersions of FePt@Au and FePt synthesized after ligand exchange with mercaptoundecanoic acid. The particle size determined from [...]texto impreso
Slow nanocrystallization driving dynamics can be affected by the combination of two factors: sample residual stresses and sample geometry. This effect is evidenced at the initial stages of nanocrystallization of amorphous CoFeSiBCuNb magnetic mi[...]texto impreso
Litran, R. ; Sampedro, B. ; Rojas,, T. C. ; Multigner, M. ; Sánchez López, J. C. ; Crespo del Arco, Patricia ; López Cartes, C. ; García, M. A. ; Hernando Grande, Antonio ; Fernández, A. | American Physical Society | 2006-02Palladium nanoparticles capped with different protective systems in a size range between 1.2 and 2.4 nm have been obtained by varying the preparation chemical method. Magnetization curves for all the samples show hysteresis loops, evidencing a f[...]texto impreso
Rivero, G. ; Crespo del Arco, Patricia ; Pulido, E ; Garcia-Escorial, A. ; Hernando Grande, Antonio ; Vázquez, M. ; Vallet, M. ; Gonzalez-Calbet, J. | American Institute of Physics | 1991-04-15The specific magnetic moment, coercive force, anisotropy field, and saturation magnetostriction constant have been measured in Co(1-x)P(x) amorphous ribbons with 0.04 less-than-or-equal-to x less-than-or-equal-to 0.27. Differential scanning calo[...]texto impreso
Crespo del Arco, Patricia ; Hernando Grande, Antonio ; Yavari, R ; Drbohlav, O. ; Garcia Escorial, A. ; Barandiaran, J. M. ; Orue, I. | American Physical Society | 1993-09-01A ferromagnetic and supersaturated fcc Fe_51Cu_49 solid solution has been obtained by mechanical alloying. After subsequent thermal treatments the fcc phase undergoes a spinodal decomposition which finally, at 780 K, yields a mixture of fcc and [...]texto impreso
Marín, P. ; López, M. ; Vlad, A. ; Hernando Grande, Antonio ; Ruiz González, M. L: ; González Calbet, J. M. | American Institute of Physics | 2006-07-17We present the possibility of tuning the nanocrystalline microstructure of Co-rich samples by magnetic field annealing. Custom assembly of nucleated grains, aligned in the field direction, has been observed by means of high resolution transmissi[...]texto impreso
Cobos Fernández, Miguel Ángel ; Presa Muñoz del Toro, Patricia de la ; Llorente, I. ; Alonso Rodríguez, José María ; Garcia Escorial, A. ; Marín Palacios, María Pilar ; Hernando Grande, Antonio ; Jiménez, J. A. | American Chemical Society | 2019-07-18Magnetic properties of spinel zinc ferrites are strongly linked to the synthesis method and the processing route since they control the microstructure of the resulting material. In this work, ZnFe_2O_4 nanoparticles were synthesized by the mecha[...]texto impreso
Garcia, N. ; Crespo del Arco, Patricia ; Hernando Grande, Antonio ; Bovier, C. ; Serughetti, J. ; Bovier, C. ; Duval, E. | American Physical Society | 1993-01-01We have studied the magnetic properties of Cu-doped porous silica gels and found that the system seems to be ferromagnetic up to room temperature. This result is fascinating because the amount of Cu ranges from 0.15% to 3% in weight of the total[...]texto impreso
De la Venta, J. ; Fernandez Pinel, E. ; García, M. A. ; Crespo del Arco, Patricia ; Hernando Grande, Antonio ; Rodríguez de la Fuente, Óscar ; De Julián Fernández, C ; Fernández, A ; Penadés, S. | World Scientific Publ Co Pte Ltd | 2007-03-10We review here our recent results of experimental observation of room temperature magnetism in gold nanoparticles (NPs) and thin. films. Capping gold surfaces with certain organic molecules leads to the appearance of magnetism at room temperatur[...]texto impreso
Garcia, M.A. ; Fernandez Pinel, E. ; Quesada, A. ; De la Venta, M. L. ; Crespo del Arco, Patricia ; LLopis, J. ; Hernando Grande, Antonio | Amer Chemical Soc | 2007-06We experimentally show that it is possible to induce room-temperature ferromagnetic-like behavior in ZnO nanoparticles without doping with magnetic impurities but simply inducing an alteration of their electronic configuration. Capping ZnO nanop[...]texto impreso
Lopez Maldonado, K. L. ; Presa Muñoz del Toro, Patricia de la ; Flores Tavizon, E. ; Farias Mancilla, J: R: ; Matutes Aquino, J. A. ; Hernando Grande, Antonio ; Elizalde Galindo, J. T. | American Institute of Physics | 2013-05-07Magnetite nanostructured powder samples were synthesized by aging chemical method. Phase, structural, and magnetic properties were characterized. X-ray diffraction patterns showed cubic magnetite pure phase, with average crystallite size, [...]texto impreso
Gómez Polo, Cristina ; Pérez Landazabal,, J. I. ; Recarte, Vicente ; Vázquez, M. ; Hernando Grande, Antonio | American Physical Society | 2004-09The magnetic transition in a FeSiBCuNb nanocrystalline alloy, associated with the decoupling of ferromagnetic crystallites around the Curie point of the residual amorphous matrix, is analyzed in this work through the temperature dependence of th[...]texto impreso
Alberca, A. ; Nemes, Norbert Marcel ; Mompean, F. J. ; Feher, T. ; Simón, F. ; Tornos, J. ; León Yebra, Carlos ; Munuera, C. ; Kirby, B. J. ; Fitzsimmons, M. R. ; Hernando Grande, Antonio ; Santamaría Sánchez-Barriga, Jacobo ; Gárcia Hernández, M. | American Physical Society | 2013-10-11The magnetism of La_(0.7)Ca_(0.3)MnO_(3) (LCMO) epitaxial thin films grown on SrTiO_(3) (STO) and BaTiO_(3) (BTO) substrates is studied using polarized neutron reflectometry (PNR) and ferromagnetic resonance (FMR) techniques. In LCMO/BTO, PNR r[...]texto impreso
Hernando Grande, Antonio ; Cortés Gil, Raquel ; González Merchante, Daniel ; Hernando González, María ; Alonso Rodríguez, José María ; García García Tuñón, Miguel Ángel ; Martínez, José L. ; Ruiz Gonález, María Luisa ; González Calbet, José María | American Physical Society | 2019-01-03We describe here a type of magnetoresistance that takes place in naturally layered and outstanding ordered single phase manganites that may be mediated by magnon excitation. In particular, we show the effect for the Ruddlesden-Popper compound, L[...]texto impreso
Hernando Grande, Antonio ; Crespo del Arco, Patricia ; Escorial Garcia, A. ; Barandiaran, J. M. | American Physical Society | 1993-05-31In conclusion we have proven that the fact that both fcc FeCu and bcc Fe magnetization agree at 300 K is simply an accident and our data at low temperature show clearly that the Fe contribution after precipitation from the metastable phase has a[...]texto impreso
Hernando Grande, Antonio ; Crespo del Arco, Patricia ; García, M. A. | Hindawi Publishing Corporation | 2005-12In this paper, we reviewed some relevant aspects of the magnetic properties of metallic nanoparticles with small size ( below 4 nm), covering the size effects in nanoparticles of magnetic materials, as well as the appearance of magnetism at the[...]texto impreso
Kirkland, J. P. ; Woicik, J. C. ; Crespo del Arco, Patricia ; Hernando Grande, Antonio ; Garcia Escorial, A. | American Physical Society | 1996-08-01Extended x-ray-absorption fine-structure (EXAFS) measurements were used to obtain element- specific, structural, and chemical information of the local environments around Cu and Fe atoms in high-energy ballmilled Cu_Fe_(12-X) samples (x=0.50 and[...]texto impreso
Hernando Grande, Antonio ; Crespo del Arco, Patricia ; Garcia, M.A. | American Physical Society | 2006-02-10The origin of orbital magnetism recently observed in different nanostructured films and particles is discussed as a consequence of spin-orbit coupling. It is shown that contact potentials induced at the thin film surface by broken symmetries, as[...]texto impreso
Presa Muñoz del Toro, Patricia de la ; Luengo, Y. ; Velasco, V. ; Morales, P. M. ; Iglesias, M. ; Veintemillas-Verdaguer, S. ; Crespo del Arco, Patricia ; Hernando Grande, Antonio | Amer Chemical Soc | 2015-05-21The influence of magnetic interactions in assemblies formed by either aggregated or disaggregated uniform gamma-Fe_2O_3 particles are investigated as a function of particle size, concentration, and applied field. Hyperthermia and magnetization m[...]texto impreso
Crespo del Arco, Patricia ; Litran, R. ; Rojas, T. C. ; Multigner, M. ; De la Fuente, J. M. ; Sánchez López, J. C. ; García, M. A. ; Hernando Grande, Antonio ; Penadés, S. ; Fernández, A. | American Physical Society | 2004-08-20We report on the experimental observation of magnetic hysteresis up to room temperature in thiol-capped Au nanoparticles with 1.4 nm size. The coercive field ranges from 860 Oe at 5 K to 250 Oe at 300 K. It is estimated that the Au atoms exhibit[...]texto impreso
Martínez, A ; Romero, J.J. ; Bartolome, F. ; Garcia, L.M. ; Baudelet, F. ; Hernando Grande, Antonio ; Crespo del Arco, Patricia | Amer Inst Physics | 2012-07-02The room temperature changes of the magnetic behavior under pressure of an invar alloy of nominal composition [Fe_(0.5)Cu_(0.5)]_(87)Zr_(13) (at. %) has been studied by K-edge x-ray magnetic circular dichroism (XMCD) and x-ray absorption near e[...]texto impreso
Presa Muñoz de Toro, Patricia De la ; Marín Palacios, María Pilar ; Hernando Grande, Antonio ; Spottorno Giner, Jorge ; Cobos Fernández, Miguel Ángel ; Morales Casero, Irene ; Archilla Sanz, Diego ; Giacomone, Luis Fernando | 2018-10-16Este proyecto persigue un doble objetivo. Por un lado, por medio de acciones formativas específicas, facilitar al personal docente de secundaria y bachillerato los medios para el montaje y realización de experimentos sencillos de bajo coste, que[...]texto impreso
Moya, Alberto ; Archilla Sanz, Diego ; Navarro Palma, Elena ; Hernando Grande, Antonio ; Marín Palacios, María Pilar | MDPI | 2019-07-12Co-based amorphous microwires presenting the giant magnetoimpedance effect are proposed as sensing elements for high sensitivity biosensors. In this work we report an experimental method for contactless detection of stress, temperature, and liqu[...]texto impreso
Ayuela, A. ; Crespo del Arco, Patricia ; Garcia, M.A. ; Hernando Grande, Antonio ; Echenique, P. M. | IOP Publishing | 2012-01-31Using first-principles calculations, we consider the bond between thiolate and small Au clusters, with particular emphasis on the resulting magnetic moment. The moment of pure gold clusters is 1 mu(B) for clusters with an odd number of Au atoms [...]texto impreso
Hernando Grande, Antonio ; Gálvez Alonso, Fernando ; García, Miguel A. ; Guinea, Francisco | Elsevier | 2020-02-15We analyze the contribution of the inhomogeneous magnetic field induced by an electrical current to the spin Hall effect in metals. The Zeeman coupling between the field and the electron spin leads to a spin dependent force, and to spin accumula[...]texto impreso
Crespo del Arco, Patricia ; González, J. M. ; Hernando Grande, Antonio ; Ynduráin, F. J. | American Physical Society | 2004-01It has been found that in highly anisometric ribbon-shaped Fe particles with nanoscale dimensions that the magnetization decreases with temperature markedly faster than in bulk bcc Fe. This anomalous dependence, which becomes more remarkable as [...]texto impreso
Crespo del Arco, Patricia ; Hernando Grande, Antonio ; Garcia Escorial, A. | American Institute of Physics | 1994-05-01Experimental results corresponding to the saturation magnetization and coercive field during the decomposition, upon annealing, of bcc and fcc Fe_xCu_(1-x), obtained by mechanical alloying are reported. The overall behavior points out that the d[...]texto impreso
Presa Muñoz del Toro, Patricia de la ; Rueda, T. ; Hernando Grande, Antonio ; Ramallo López, J. M. ; Giovanetti, L. J. ; Requejo, F. G. | American Institute of Physics | 2008-05-15In this work we present new results on spontaneous oxidation of disordered fcc FePt nanoparticles. The "as-made" oleic acid and oleylamine coated FePt nanoparticles of average size 4 nm synthesized by a high-boiling coordinating solvent method w[...]texto impreso
We have succeeded in increasing up to 150 K the Curie temperature in the Fe_(64)Ni_(36) invar alloy by means of a severe mechanical treatment followed by a heating up to 1073 K. The invar behavior is still present as revealed by the combination [...]texto impreso
Guerrero, E. ; Muñoz Márquez, M. A. ; García, M. A. ; Crespo del Arco, Patricia ; Fernandez Pinel, E. ; Hernando Grande, Antonio ; Fernández, A. | IOP publishing ltd | 2008-04-30Surface plasmon resonance measurements and magnetic characterization studies have been carried out for two types of thiol-capped gold nanoparticles (NPs) with similar diameters between 2.0 and 2.5 nm and different organic molecules linked to the[...]texto impreso
García, M. A. ; De la Venta, J ; Crespo del Arco, Patricia ; LLopis,, J. ; Penadés, S. ; Fernández, A. ; Hernando Grande, Antonio | American Physical Society | 2005-12In this Rapid Communication we show the relationship between surface plasmon resonance damping and the intensity of surface bonding for capped Au nanoparticles, (NPs). Up to now the influence of capping has been included as a phenomenological mo[...]texto impreso
Presa Muñoz del Toro, Patricia de la ; Multigner, M. ; Morales, M. P. ; Rueda, T. ; Fernandez Pinel, E. ; Hernando Grande, Antonio | Elsevier Science BV | 2007-09In this work, the structural and magnetic properties of the gold- coated FePt nanoparticles synthesized from high- temperature solution phase are presented. The amount of gold was optimized to obtain most of the FePt particles coated. The partic[...]texto impreso
Romero, J.J. ; Cuadrado, R. ; Arroyo, A. ; García, M. A. ; Hernando Grande, Antonio ; Cortés Gil, R ; González Calbet, J. M. ; Vallet Regí, V. | American Institute of Physics | 2006-04-15Data are presented on the thermal dependence of the hysteretic properties of cationic vacancies including manganite samples of composition LaMnO_(3+?)(?=0.05 and 0.12). Our results evidence the presence in both samples of two magnetic phases hav[...]texto impreso
Hernando Grande, Antonio ; Crespo del Arco, Patricia ; Castaño, F. J. ; Arcas, J. ; Multigner, M. ; Barandiaran, J. M. ; Fernández Barquín, L. | American Physical Society | 2000-01-01We report the existence of a thermally induced sharp increase of thermoremanence around the Curie temperature of Invar-like Fe-Zr(B,Cu) soft magnetic glasses. Neutron-diffraction measurements indicate that a true enhancement of the average local[...]texto impreso
Lopez-Dominguez, V. ; García, M. A. ; Marín Palacios, María Pilar ; Hernando Grande, Antonio | Nature Publishing Group | 2017-07-24In this work, we demonstrate theoretically and experimentally the possibility of tuning the electromagnetic properties of metamaterials with magnetic fields by incorporating amorphous magnetic microwires. The large permeability of these wires at[...]texto impreso
Magnetism of capped nanoparticles, NPs, of non- magnetic substances as Au and ZnO is briefly reviewed. The source of the magnetization is discussed on the light of recent X-ray magnetic circular dichroism experiments. As magnetic dichroism analy[...]