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American Institute of Physics |
Documentos disponibles de esta editorial (326)
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González López, Artemio ; Hernández Heredero, Rafael ; Beffa, Gloria Marí | American Institute of Physics | 1997-11In this paper we find an explicit formula for the most general vector evolution of curves on RPn?1 invariant under the projective action of SL(n, R). When this formula is applied to the projectivization of solution curves of scalar Lax operators[...]texto impreso
Mialdun, A. ; Sechenyh, V. ; Legros, J. C. ; Ortiz de Zárate Leira, José María ; Shevtsova, V. | American Institute of Physics | 2013-09-14We present a comprehensive analysis of experimental results obtained for Fickian diffusion in the benchmark ternary liquid mixture of 1,2,3,4-tetrahydronaphthalene, isobutylbenzene, and dodecane (nC(12)) with equal mass fractions. Isothermal dif[...]texto impreso
Mártil de la Plaza, Ignacio ; García Hemme, Eric ; García Hernansanz, Rodrigo ; González Díaz, Germán ; Olea Ariza, Javier ; Prado Millán, Álvaro del | American Institute of Physics | 2012Ti supersaturated Si layers with two different thicknesses have been obtained on the top of a Si substrate by means of ion implantation and pulsed laser melting processes. Time-of-flight Secondary Ion Mass spectrometry (ToF-SIMS) measurements sh[...]texto impreso
Velasco, J. L. ; Castejón, F. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Tarancón, A. | American Institute of Physics | 2008The ion Drift Kinetic Equation (DKE) which describes the ion coUisional transport is solved for the TJ-II device plasmas. This non-linear equation is computed by peribrming a mean field iterative calculation. In each step of the calculation, a F[...]texto impreso
Campoamor Stursberg, Otto Ruttwig ; Rausch de Traubenberg, Michel | American Institute of Physics | 2008We study and classify kinematical algebras which appear in the framework of Lie superalgebras or Lie algebras of order three. All these algebras are related through generalised Inonü-Wigner contractions from either the orthosymplectic superalgeb[...]texto impreso
A Klein–Gordon field with a derivative fourth order self?coupling is studied. It is shown that the kinks of the model form singlets, doublets, or triplets of electric charge, according to the values of the coupling constants.texto impreso
Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Olea Ariza, Javier | American Institute of Physics | 2009-09-01We have studied the laser thermal annealing (LTA) effects on single crystal GaP. The samples have been analyzed by means of Raman spectroscopy, glancing incidence x-ray diffraction (GIRXD), and transmission electron microscopy (TEM) measurements[...]texto impreso
Gálvez, F. ; Valle, J. del ; Gómez Gutiérrez, Alicia ; González Herrera, Elvira María ; Navarro Palma, Elena ; Vicent López, José Luis ; Soriano, N. ; Mora, B. ; Rollano, V. ; Gargiani, P. | American Institute of Physics | 2020-06-01The development of multilayered materials with engineered magnetic properties compels a deep knowledge of physical properties at the atomic scale. The magnetic anisotropy is a key property in these materials. This work accounts for the magnetic [...]texto impreso
Li, W. B. ; Zhang, K. J. ; Sengers, Jan V. ; Gammon, R. W. ; Ortiz de Zárate Leira, José María | American Institute of Physics | 2000-05-22We have performed light-scattering measurements in dilute and semidilute polymer solutions of polystyrene in toluene when subjected to stationary temperature gradients. Five solutions with concentrations below and one solution with a concentrati[...]texto impreso
The DaveyStewartson equation is considered from the point of view of the bilinear formalism of the Kyoto school. Multidromion solutions are constructed in terms of free fermions and their asymptotic properties are characterized. The dynamical pr[...]texto impreso
We study some global properties of a self?interacting Dirac field which has been used to construct a classical stable model of the hydrogen atom. It is shown that the normalization condition produces the correct values of both charge and spin an[...]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
Domínguez-Adame Acosta, Francisco ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier ; Prieto, P. | American Institute of Physics | 1992-03-15Visible and near infrared cathodoluminescence of Bi_2Sr_2CaCu_2O_x and YBa_2Cu_3O_(7-x) films is investigated in the scanning electron microscope. In particular, possible analogies in the cathodoluminescence of both systems have been analyzed. T[...]texto impreso
Zaldivar, M.H. ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | American Institute of Physics | 1998-01-01Cathodoluminescence (CL) in the scanning electron microscope is used to investigate the nature of defects responsible for the luminescence associated with round and hexagonal-like topographic features of GaN:Si films. Round hillocks of the size [...]texto impreso
Cremades Rodríguez, Ana Isabel ; Piqueras de Noriega, Javier | American Institute of Physics | 1995-09-01The effect of laser cutting on the structure of a chemical vapor deposited diamond film has been investigated by cathodoluminescence (CL) in the scanning electron microscope. The variation of particle morphology and CL spectra as a function of t[...]texto impreso
Cremades Rodríguez, Ana Isabel ; Piqueras de Noriega, Javier ; Remon, A. ; Garcia, J. A. ; Santos, M. T. ; Dieguez, E. | American Institute of Physics | 1998-06-15Changes on the defect structure of Bi12GeO20 (BGO) and Bi12SiO20 (BSO) crystals induced by thermal treatments and laser irradiation have been studied by means of cathodoluminescence in the scanning electron microscope. The results have been comp[...]texto impreso
We review the N_c and m_? dependence of the rho(770) and ? (or f_0(600) resonances generated with the Inverse Amplitude Method. The ? N_c behavior is at odds with being dominantly a q?q? state, but there is a hint of a subdominant q?q?o componen[...]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
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
Joshi, Amish G ; Kryukov, Sergiy A. ; De Long, Lance E. ; González Herrera, Elvira María ; Navarro Palma, Elena ; Villegas, Javier E. ; Vicent López, José Luis | American Institute of Physics | 2007-05-01We report vibrating reed and superconducting quantum interference device magnetometer data that exhibit prominent dips or oscillations of the superconducting (SC) onset temperature, Delta T(C)(H)approximate to 0.01-0.7 K, for a [Nb(23 nm)/Ni(5 n[...]texto impreso
Nemes, Norbert Marcel ; Visani, C. ; León Yebra, Carlos ; Gárcia Hernández, M. ; Simón, F. ; Feher, T. ; te Velthuis, S. G. E. ; Hoffmann, A. ; Santamaría Sánchez-Barriga, Jacobo | American Institute of Physics | 2010-07-19We report a memory concept utilizing ferromagnet/superconductor/ferromagnet La_(0.7)Ca_(0.3)MnO_(3)/YBa_(2)Cu_(3)O_(7)/La_(0.7)Ca_(0.3)MnO_(3) thin film hybrid structures. The orientation of the magnetic field with respect to the ferromagnetic e[...]texto impreso
Navarro Palma, Elena ; Vélez, M. ; Huttel, Y. ; Pérez Junquera, A. ; Martín, J. Y. ; Lima, O. F. de ; Cebollada, A. ; Alameda, J. M. ; Vicent López, José Luis | American Institute of Physics | 2009-02-01Shifted hysteresis loops characteristic of the exchange bias effect between a ferromagnet and an antiferromagnet are demonstrated in structures formed by a 2.5 nm Cr layer deposited on top of an array of Fe nanoislands (Cr/Fe-nanoislands). This [...]texto impreso
Pérez de Lara, David ; Castaño, F. J. ; Ng, B. G. ; Körner, H. S. ; Dumas, R. K. ; González Herrera, Elvira María ; Liu, Kai ; Ross,, C. A. ; Schuller, Ivan K. ; Vicent López, José Luis | American Institute of Physics | 2011-10-31Strong superconducting pinning effects are observed from magnetic landscapes produced by arrays of circular rings with varying magnetic remanent states. The collective and the background pinning of superconducting Nb films is strongly enhanced b[...]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
Díaz-Guerra Viejo, Carlos ; Pérez García, Lucas ; Piqueras de Noriega, Javier ; Chioncel, M. F. | American Institute of Physics | 2009-11-15Magnetic transitions in single-crystal alpha-F_2O_3 (hematite) nanowires, grown by thermal oxidation of iron powder, have been studied in the range of 5-1023 K with a superconducting quantum interference device below room temperature and with a [...]texto impreso
Valle Granda, Javier del ; Gómez, A. ; González, E. M. ; Vicent López, José Luis | American Institute of Physics | 2016-10-24In order to compare magnetic and non-magnetic pinning, we have nanostructured two superconducting films with the regular arrays of pinning centers: Cu (non-magnetic) dots in one case and Py (magnetic) dots in the other. For low applied magnetic [...]texto impreso
Prieto, P. ; Vivas, P. ; Campillo, G. ; Baca, E. ; Castro, L. F. ; Varela del Arco, María ; Ballesteros, C. ; Villegas, J. E. ; Arias Serna, Diego ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Institute of Physics | 2001-06-15We report on the magnetic and superconducting properties of La_(0.7)Ca_(0.3)MnO_(3)/YBa_(2)Cu_(3)O_(7) (LCMO/YBCO) superlattices. For a constant LCMO layer thickness of 6 unit cells (u.c.), resistance and susceptibility measurements show superco[...]texto impreso
Lopez Maldonado, K. L. ; Vazquez Zubiate, L. ; Presa Muñoz del Toro, Patricia de la ; Matutes Aquino, J. A. ; Elizalde Galindo, J. T. | American Institute of Physics | 2014-05-07Manganese and Zinc ferrites were prepared by solid state reaction. The resulting powders were pressed into pellets and heat treated at 1100 ?C. The samples were characterized by using X-ray diffraction, pure phases of zinc ferrite (ZnFe²O?) and [...]texto impreso
Guerrero, E. ; Munoz-Marquez, M. A. ; Fernández, A. ; Crespo del Arco, Patricia ; Hernando, A. ; Lucena, R. ; Conesa, J. C. | American Institute of Physics | 2010-03-15In the last years, the number of studies performed by wholly independent research groups that confirm the permanent magnetism, first observed in our research lab, for thiol-capped Au nanoparticles (NPs) has rapidly increased. Throughout the year[...]texto impreso
Mathematics is the language of science however, in secondary and high school education students are not made aware of the strong implications behind this statement. This is partially caused because mathematical training and the modelling of natu[...]texto impreso
We present a theoretical analysis of quasicrystals (QCs) as potential thermoelectric materials. We consider a self-similar density of states model and extend the framework introduced in [G. D. Mahan and J. O. Sofo, Proc. Natl. Acad. Sci. U.S.A. [...]texto impreso
Kholmetskii, Alexsander L. ; Missevitch, Oleg V. ; Smirnov Rueda, Román | American Institute of Physics | 2007We start with the general approach based on conventional solutions to Maxwell's equations and show that in the near zone of macroscopic electromagnetic sources the electromotive force produced in receiving loop antenna is intimately linked to th[...]texto impreso
Vázquez Peñas, José R. ; Ortiz de Zárate Leira, José María ; Khayet Souhaimi, Mohamed | American Institute of Physics | 2008-08-15We present experimental results of the thermal conductivity of several nanofluids prepared by dispersing nanoparticles of SiO(2) and CuO in water and ethylene glycol at various concentrations up to approximate to 5% in mass fraction. The measure[...]texto impreso
Roldán, É. ; Martínez, I. A. ; Dinis Vizcaíno, Luis Ignacio ; Rica, R.A. | American Institute of Physics | 2014-06-09We report on the measurement of the average kinetic energy changes in isothermal and nonisothermal quasistatic processes in the mesoscale, realized with a Brownian particle trapped with optical tweezers. Our estimation of the kinetic energy chan[...]texto impreso
Using a field theoretical, QCD inspired Hamiltonian formulated in the Coulomb gauge, relativistic many-body calculations are reported which reproduce the semiquantitative features of the observed meson and lattice glueball spectrums. Dynamical c[...]texto impreso
Lucía Mulas, María Luisa ; Sánchez Quesada, Francisco ; Santamaría Sánchez-Barriga, Jacobo ; Sefrioui, Zouhair ; Varela del Arco, María ; Arias Serna, Diego ; Loos, G. ; Navacerrada, M.A. | American Institute of Physics | 1998-12-07We have studied the effect of He+ irradiation on the electrical resistivity and Curie temperature of ferromagnetic SrRuO3 thin films. An evolution from metallic to insulating behavior is observed when He+ ion fluence is increased, suggesting a m[...]texto impreso
Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Prado Millán, Álvaro del ; San Andres Serrano, Enrique | American Institute of Physics | 2003-07-15The effect of rapid thermal annealing (RTA) processes on the structural properties of SiOxNyHz films was investigated. The samples were deposited by the electron cyclotron resonance plasma method, using SiH4, O-2 and N-2 as precursor gases. For [...]texto impreso
Carmona Tejero, Noemi ; Bouzas, V. ; Jiménez de la Morena, J. ; García, M. A. | American Institute of Physics | 2010We present here some miniaturised devices designed for the detection of nanorods in water and blood media. The devices use light emitting diodes as monochromatic light sources and Si photodiodes for detection. Devices working on transmission mod[...]texto impreso
The dynamics of thermoplastic-photoconductor films is reviewed. A theory of thermoplastic film deformation is presented for a three-layer structure in air with modified boundary conditions. The amplitude of the deformation A versus the spatial f[...]texto impreso
Cabero Piris, M. ; Nagy, K. ; Gallego, F. ; Sander, A. ; Rio, M. ; Cuellar, F.A. ; Tornos, J. ; Hernández Martín, David ; Nemes, Norbert Marcel ; Mompean, F. ; Gárcia Hernández, M. ; Rivera Calzada, Alberto Carlos ; Sefrioui, Zouhair ; Reyren, N. ; Feher, T. ; Varela del Arco, María ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Institute of Physics | 2017-09Controlling magnetic anisotropy is an important objective towards engineering novel magnetic device concepts in oxide electronics. In thin film manganites, magnetic anisotropy is weak and it is primarily determined by the substrate, through indu[...]texto impreso
Jimeno Romero, Pablo ; Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la | American Institute of Physics | 2012-07In the context of f(R) modified gravity theories we determine that the black holes existence is determined by the sign of a parameter dependent of the mass, the charge, the spin and the scalar curvature. We obtain the different astrophysical obj[...]texto impreso
Jaulent, Marcel ; Manna, Miguel A. ; Martínez Alonso, Luis | American Institute of Physics | 1989-08A multiseries integrable model (MSIM) is defined as a family of compatible flows on an infinite-dimensional Lie group of N-tuples of formal series around N given poles on the Riemann sphere. Broad classes of solutions to a MSIM are characterized[...]texto impreso
We review our work on the ? and ? resonances derived from the Inverse Amplitude Method. In particular, we study the leading 1/N_c behavior of the resonances masses and widths and their evolution with changing m_?. The 1/Nc expansion gives a clea[...]texto impreso
Ngai, K. L. ; Lunkenheimer, P. ; León Yebra, Carlos ; Schneider, U. ; Brand, R. ; Lodl, A. | American Institute of Physics | 2001-07-15Previous dielectric relaxation measurements of glycerol and propylene carbonate and new results on propylene glycol performed below the conventional glass transition temperatures T_(g) after long periods of aging all show that the excess wing (a[...]texto impreso
Nogales Díaz, Emilio ; Joachimsthaler, I. ; Heiderhoff, R. ; Piqueras de Noriega, Javier ; Balk, L.J. | American Institute of Physics | 2002-07-15Near-field cathodoluminescence (NFCL) has been used to characterize hydride vapor phase epitaxy grown n-GaN films. This technique can obtain high resolution luminescence images and perform local measurements of the diffusion length for minority [...]texto impreso
Analysis of the question whether or not a given dynamical system has closed trajectories is of great importance for applications and represents independent theoretical interest. The authors give a new geometrical proof of the extension of the Be[...]texto impreso
We say that several scalar time series are dynamically coupled if they record the values of measurements of the state variables of the same smooth dynamical system. We show that much of the information lost due to measurement noise in a target t[...]texto impreso
Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Yllanes, D. ; otros, ... | American Institute of Physics | 2009The out of equilibrium evolution for an Edwards?Anderson spin glass is followed for a tenth of a second, a long enough time to let us make safe predictions about the behaviour at experimental scales. This work has been made possible by Janus, an[...]texto impreso
Fernández Álvarez-Estrada, Ramón ; Pastor, I. ; Guasp, J. ; Castejón, F. | American Institute of Physics | 2012-06The classical nonlinear incoherent Thomson scattering power spectrum from a single relativistic electron with incoming laser radiation of any intensity, investigated numerically by the present authors in a previous publication, displayed both an[...]texto impreso
In this paper we analyze Abelian diagonal orthogonally transitive space–times with spacelike orbits for which the matter content is a stiff perfect fluid. The Einstein equations are cast in a suitable form for determining their geodesic complete[...]