Publications (18)
A detailed analysis of dipolar interactions and analytical approximations in arrays of magnetic nanowires
D. Laroze, J. Escrig, P. Landeros +3
The investigation of the role of interactions in magnetic wire arrays is complex and often subject to strong simplifications. In this paper we obtained analytical expressions for t…
Emission and Propagation of Multi-Dimensional Spin Waves with nanoscale wavelengths in Anisotropic Spin Textures
V. Sluka, T. Schneider, R. A. Gallardo +15
Spin waves offer intriguing novel perspectives for computing and signal processing, since their damping can be lower than the Ohmic losses in conventional CMOS circuits. For contro…
Magnetic behavior of nanoparticles in patterned thin films
J. Escrig, P. Landeros, J. C. Retamal +2
The magnetic behavior of truncated conical nanoparticles in patterned thin films is investigated as a function of their size and shape. Using a scaling technique, phase diagrams gi…
Dzyaloshinskii-Moriya Interaction and Dipole-Exchange Curvature Effects on the Spin-Wave Spectra of Magnetic Nanotubes
B. Mimica-Figari, P. Landeros, R. A. Gallardo
This work explores spin-wave dynamics in magnetic nanotubes, focusing on the influence of the Dzyaloshinskii-Moriya interaction and curvature. The study uses analytical methods to…
Magnetic phase diagrams of barcode-type nanostructures
B. Leighton, O. J. Suarez, P. Landeros +1
The magnetic configurations of barcode-type magnetic nanostructures consisting of alternate ferromagnetic and nonmagnetic layers arranged within a multilayer nanotube structure are…
Properties of magnetic nanodots with perpendicular anisotropy
E. R. P. Novais, P. Landeros, A. G. S. Barbosa +3
Nanodots with magnetic vortices have many potential applications, such as magnetic memories (VRAMs) and spin transfer nano-oscillators (STNOs). Adding a perpendicular anisotropy te…
Magnon confinement and trapping at the nanoscale
J. Chen, H. Yu, R. Gallardo +2
Magnon confinement and trapping refer to the localization of magnons-quasiparticles that represent collective spin-wave excitations in magnetic materials-within specific regions or…
Interfacial Dzyaloshinskii-Moriya interaction in Pt/CoFeB films: effect of the heavy-metal thickness
S. Tacchi, R. E. Troncoso, M. Ahlberg +4
We report the observation of a Pt layer thickness dependence on the induced interfacial Dzyaloshinskii-Moriya interaction in ultra-thin Pt()/CoFeB films. Taking adva…
Angular dependence of coercivity in magnetic nanotubes
J. Escrig, M. Daub, P. Landeros +2
The nucleation field for infinite magnetic nanotubes, in the case of a magnetic field applied parallel to the long axis of the tubes, is calculated as a function of their geometric…
Reversal modes in magnetic nanotubes
P. Landeros, S. Allende, J. Escrig +3
The magnetic switching of ferromagnetic nanotubes is investigated as a function of their geometry. Two independent methods are used: Numerical simulations and analytical calculatio…
Scaling relations for magnetic nanoparticles
P. Landeros, J. Escrig, D. Altbir +3
A detailed investigation of the scaling relations recently proposed by [J. d'Albuquerque e Castro, D. Altbir, J. C. Retamal, and P. Vargas, Phys. Rev. Lett. 88, 237202 (2002)] to s…
Magnetostatic fields in tubular nanostructures
P. Landeros, P. R. Guzman, R. Soto-Garrido +1
The non-uniform magnetostatic field produced by the equilibrium and non equilibrium magnetic states of magnetic nanotubes has been investigated theoretically. We consider magnetic…
Spin-wave spectra in periodically surface-modulated ferromagnetic thin films
R. A. Gallardo, M. Langer, A. Roldán-Molina +4
This article presents theoretical results for the dynamic response of periodically surface-modulated ferromagnetic thin films. For such system, the role of the periodic dipolar fie…
Effect of perpendicular uniaxial anisotropy on the annihilation fields of magnetic vortices
E. R. P. Novais, S. Allende, D. Altbir +3
The magnetic vortex structure, that is present in several nanoscopic systems, is stable and can be manipulated through the application of a magnetic field or a spin polarized curre…
Flat Bands, Indirect Gaps, and Unconventional Spin-Wave Behavior Induced by a Periodic Dzyaloshinskii-Moriya Interaction
R. A. Gallardo, D. Cortés-Ortuño, T. Schneider +7
Periodically patterned metamaterials are known for exhibiting wave properties similar to the ones observed in electronic band structures in crystal lattices. In particular, periodi…
Vortex core size in interacting cylindrical nanodot arrays
D. Altbir, J. Escrig, P. Landeros +2
The effect of dipolar interactions among cylindrical nanodots, with a vortex-core magnetic configuration, is analyzed by means of analytical calculations. The cylinders are placed…
Nonreciprocal Spin-Wave Propagation in Anisotropy-Graded Iron Films Prepared by Nitrogen Implantation
L. Christienne, J. Jiménez-Bustamante, P. Rovillain +8
Gradual modification of the magnetic properties in ferromagnetic films has recently been proposed as an effective method to channel and control spin waves for the development of ne…
Stability of magnetic configurations in nanorings
P. Landeros, J. Escrig, D. Altbir +2
The relative stability of the vortex, onion and ferromagnetic phases in nanorings is examined as a function of the ring geometry. Total energy calculations are carried out analytic…