Strain-induced magneto-optical anisotropy in epitaxial hcp Co films

Autor:	J. B. González-Díaz, Andreas Berger, O. Idigoras, Jon Ander Arregi
Rok vydání:	2015
Předmět:	Materials science Condensed matter physics Isotropy Condensed Matter Physics Epitaxy Magnetocrystalline anisotropy Electronic Optical and Magnetic Materials Magneto optical Condensed Matter::Materials Science Amplitude Lattice (order) Physics::Atomic Physics Metallic thin films Anisotropy
Zdroj:	Physical Review B. 92
ISSN:	1550-235X 1098-0121
Popis:	We investigate the existence and origin of magneto-optical anisotropy in epitaxial hcp Co films. Our results show that a significant magneto-optical anisotropy exists in our samples and, more importantly, they reveal that its amplitude is directly correlated with epitaxial strain. We find a linear coefficient of $16.8%$ magneto-optical anisotropy per every 1% epitaxial strain, which is in stark contrast to an isotropic magneto-optical coupling factor $Q$, a very frequent and common assumption in magneto-optics of metallic thin films and multilayers. In addition, the Co films exhibit a similar strain-induced increase of the magnetocrystalline anisotropy energy, evidencing the fact that both magneto-optical anisotropy and magnetocrystalline anisotropy are dependent on the modification of the spin-orbit coupling introduced by anisotropic lattice distortions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8afc7afde3332c477b8d5016a2dfedb4 https://doi.org/10.1103/physrevb.92.184405 Zobrazit plný text záznamu