Magnetic anisotropy of [Co{sub 2}MnSi/Pd]{sub n} superlattice films prepared on MgO(001), (110), and (111) substrates
- Department of Physical Electronics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552 (Japan)
- Samsung R and D Institute Japan-Yokohama, 2-7, Sugasawa-cho, Tsurumi-ku, Yokohama-shi, Kanagawa-ken 230-0027 (Japan)
Superlattice films with full-Heusler Co{sub 2}MnSi (CMS) alloy and Pd layers prepared on Pd-buffered MgO(001), (110), and (111) substrates were investigated. Crystal orientation and epitaxial relationship of Pd and CMS layers were analyzed from x-ray diffraction, pole figure measurements, and transmission electron microscope observation. Formation of the L2{sub 1}-ordered structure in the CMS layers was confirmed by observation of CMS(111) diffraction. Perpendicular magnetic anisotropy (PMA) was obtained in the [CMS (0.6 nm)/Pd (2 nm)]{sub 6} superlattice film formed using MgO(111) substrates although other superlattice films prepared using MgO(001) and (110) substrates showed in-plane and isotropic magnetic anisotropy, respectively. The perpendicular magnetic anisotropy energy constant K for the superlattice films prepared using MgO(111) substrate was estimated to be 2.3 Mergs/cm{sup 3}, and an interfacial anisotropy constant K{sub i} per one CMS-Pd interface in the superlattice films was estimated to be 0.16 ergs/cm{sup 2}. K{sub i} in superlattice films with various crystal orientations showed positive values, indicating that Pd/CMS interfaces had an ability to induce PMA regardless of their crystal orientation.
- OSTI ID:
- 22412614
- Journal Information:
- Applied Physics Letters, Vol. 106, Issue 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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