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Enhanced Perpendicular Magnetic Anisotropy of Ferromagnetic Co40Fe40B20 through Two-Dimensional Antiferromagnetic
Yankun Li1, Bo Zhao1, Mengjuan Mi2
1Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China.
Abstract:
Antiferromagnetic materials have emerged as promising platforms for magnonic devices with lower power consumption and faster operation speed. The antiferromagnet/ferromagnet with perpendicular magnetic anisotropy is an essential heterostructure for realizing vertically polarized magnon excitation, detection, and modulation. However, it is still a significant challenge to advance this innovation. We have successfully fabricated two-dimensional antiferromagnet TMPS3 (MnPS3 and NiPS3)/Co40Fe40B20 ferromagnet heterostructures with robust perpendicular magnetic anisotropy. We experimentally observed a magnetic anisotropy transition from the in-plane to out-of-plane easy axis by incorporating a two-dimensional MnPS3 or NiPS3 underlayer. This phenomenon is mainly attributed to the Fe-TMPS3 orbital hybridization at the interface, which enhances the perpendicular magnetic anisotropy contribution from d and d orbital coupling, while simultaneously reducing the in-plane magnetic anisotropy contribution from d and d orbital coupling. Our work provides a feasible pathway for developing novel magnonic devices involving vertically or tilted polarized magnons.
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