Información del autor
Autor Crespo del Arco, Patricia |
Documentos disponibles escritos por este autor (39)
![](./images/expand_all.gif)
![](./images/collapse_all.gif)
![Selecciones disponibles](./images/orderby_az.gif)
![]()
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
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
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
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
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
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[...]