Magnetic behavior of a nano-disk constrained in an antiferromagnetic substrate

Autor:	S. A. Leonel, B. V. Costa, P. Z. Coura, R. A. Dias, J. C. S. Rocha
Rok vydání:	2012
Předmět:	Physics Hysteresis Magnetic anisotropy Exchange bias Spins Condensed matter physics Heisenberg model Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Ising model Condensed Matter Physics Symmetry (physics) Electronic Optical and Magnetic Materials
Zdroj:	Journal of Magnetism and Magnetic Materials. 324:2342-2348
ISSN:	0304-8853
Popis:	In this work we report a numerical Monte Carlo study of the behavior of a magnetic nano-disk put over an antiferromagnetic substrate. Three approaches were considered for describe the substrate: (1) A stacked antiferromagnetic configuration, (2) an Ising like arrangement and (3) Heisenberg like spins. For the Heisenberg case we still have considered an easy-plane and an easy-axis symmetry of the substrate. The hysteresis loop for the nano-disk is obtained by considering the three cases. The signature of the vortex in the nano-disk appears as small jumps in the hysteresis curve. Exchange bias effects are observed since the substrate has an easy axis symmetry.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c762fe46b8579dec1690476cc377f623 https://doi.org/10.1016/j.jmmm.2012.02.028 Zobrazit plný text záznamu Full Text from ScienceDirect