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Magnetic Anisotropy and Damping for Monolayer-Controlled Co | Ni Epitaxial Multilayer.
- Source :
- Journal of the Physical Society of Japan; 2017, Vol. 86 Issue 7, p1-10, 10p
- Publication Year :
- 2017
-
Abstract
- Structures and magnetic properties were systematically investigated for the monolayer (ML)-controlled Co | Ni multilayers with various Ni layer thicknesses, where the Co and Ni layers were epitaxially grown on a Al<subscript>2</subscript>O<subscript>3</subscript> (1120) single crystal substrate or deposited on a thermally oxidized Si substrate. The epitaxial Co | Ni multilayers exhibited high uniaxial magnetic anisotropy energies (K<subscript>u</subscript>) and low effective magnetic damping constants (α<subscript>eff</subscript>), resulting in the perpendicular magnetization with low damping even for the 1 ML-Ni | 1 ML-Co multilayer. By comparing the experimental results with the first principles calculation, we found that the Ni atoms largely contributed to the perpendicular anisotropy for the Co | Ni multilayers. We also discussed the possible mechanism dominating the magnitude of α<subscript>eff</subscript> for the Co | Ni multilayers based on the experiments and the calculations. The present results suggest that the epitaxial Co | Ni multilayer is a promising material to achieve high K<subscript>u</subscript> and low magnetic damping simultaneously. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00319015
- Volume :
- 86
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Journal of the Physical Society of Japan
- Publication Type :
- Academic Journal
- Accession number :
- 123988978
- Full Text :
- https://doi.org/10.7566/JPSJ.86.074710