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

被引:23
作者
Arregi, J. A. [1 ]
Gonzalez-Diaz, J. B. [1 ]
Idigoras, O. [1 ]
Berger, A. [1 ]
机构
[1] CIC NanoGUNE Consolider, E-20018 Donostia San Sebastian, Spain
关键词
ORIENTATION DEPENDENCE; MAGNETIC-ANISOTROPY; FCC CO; CONSTANTS; FE; TRANSITION; ENERGY; IRON;
D O I
10.1103/PhysRevB.92.184405
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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.
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页数:6
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