Journal
APPLIED PHYSICS LETTERS
Volume 110, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4978663
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Funding
- ImPACT Program of Council for Science, Technology and Innovation, Japan
- JSPS KAKENHI Grant [16H06332, 16H03852]
- Grants-in-Aid for Scientific Research [16H06332, 16H03852] Funding Source: KAKEN
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We report perpendicular magnetic anisotropy (PMA) induced at Co2FeAl/MgAl2O4(001) epitaxial interfaces prepared by magnetron sputtering and post-oxidation of MgAl layers. A PMA energy density of more than 4 Merg/cm(3) for 1-nm-thick Co2FeAl layers and an effective interface PMA energy density of 1.6 erg/cm(2) were achieved by controlling the interfacial oxidation states through fine-tuning of oxidation processes and annealing temperature. Cross-sectional scanning transmission electron microscopy imaging revealed a lattice-matched Co2FeAl/MgAl2O4 interface, which may be responsible for the large PMA energy due to a reduction of the bulk anisotropy contribution. Published by AIP Publishing.
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