Enhancing perpendicular magnetocrystalline anisotropy in Fe ultrathin films by non-noble transition-metal substrate

Shanhu Zhou and Jun Hu
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Shanhu Zhou: School of Physical Science and Technology & Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, China
Jun Hu: School of Physical Science and Technology & Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, China

International Journal of Modern Physics C (IJMPC), 2020, vol. 31, issue 09, 1-12

Abstract: Based on first-principles calculations, we studied the magnetic properties of ultrathin Fe film on a nonmagnetic substrate Ta(001). We found that the perpendicular magnetocrystalline anisotropy (PMA) of Fe/Ta(001) system with only one or two Fe atomic layer(s) can be enhanced significantly, and the corresponding magnetocrystalline anisotropy energy is enlarged tos about 3 times of that in pure ultrathin Fe film. Analysis of electronic properties demonstrates that the magnetic proximity effect at the Fe/Ta interface plays an important role in the enhancement of the PMA. Alternative arrangement of Ta and Fe layers with more Fe/Ta interfaces may further strengthen the PMA.

Keywords: Magnetocrystalline anisotropy; ultrathin film; magnetic/nonmagnetic interface; magnetic proximity effect (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1142/S012918312050134X

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