Effects of Interface Roughness and Lattice Strain on Perpendicular Magnetic Anisotropy in Co/Pd Multilayer

Abstract:

The effects of strain and interface roughness at the Co/Pd interface are investigated from the viewpoint of perpendicular magnetic anisotropy (PMA) using the DV-Xα cluster model calculation method. It is found that spin projected occupation number ratio of magnetic quantum number |m| = 2 for the Co 3d electrons enhances by expanding the lattice within a close-packed plane of fcc stacking and, hence, enhances the PMA. Rough interface decreases the spin projected occupation number ratio of |m| = 2 and, hence, decreases the PMA. These results explain the PMA properties of Co/Pd multilayers fabricated using molecular beam epitaxy (MBE) technique and RF sputtering techniques.

• Periodical: Key Engineering Materials (Volume 534)
• Pages: 7-11
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.534.7
• Online since: January 2013
• Authors: Naoto Go, Kosuke Suzuki, Shun Emoto, Masayoshi Itou, Yoshiharu Sakurai, Hiroshi Sakurai
• Keywords: Co/Pd Multilayers, DV-Xα Calculation, Interface Roughness, Lattice Strain, Occupation Number, Perpendicular Magnetic Anisotropy

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