Open Access Review Article

First Principle Studies on Magnetism of Perovskite Structured CoFeCl3 Film

Eunsung Jekal*

Department of Materials, ETH Zurich, 8093 Zurich, Switzerland

Corresponding Author

Received Date: December 04, 2019;  Published Date: December 06, 2019

Abstract

For an industrial spin-transfer torque (STT) MRAM, low switching current and high thermal stability are required, simultaneously. For this point of view, it is essential to find magnetic materials which satisfy high spin polarization and strong perpendicular magneto crystalline anisotropy (MCA). In this paper, we investigate electronic structures and MCA energies of perovskite CoFeCl3.

According to our past results, spin polarization at the Fermi level is 96%, for perovskite CoFeCl3, which are close to a half metal. Furthermore, Co-terminated films show perpendicular MCA while Fe-terminated films exhibit in-plane MCA. In particular, the MCA energy of the Co-terminated CoFeCl3 is about 1.0 meV/cell which is three times larger than that of a 5-ML CoFe film. Therefore, we expect to realize a magnetic material with high spin polarization and strong perpendicular MCA energy by utilizing Cl element, and to contribute to commercializing of the STT-MRAM.

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