Dependence of strength of spin-orbit interaction on polarity of interface

Vadym Zayets

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arXiv · 2407.06574

Dependence of strength of spin-orbit interaction on polarity of interface

Vadym Zayets

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Abstract

It was experimentally observed that both magnetic anisotropy and spin-orbit interaction strength change when the magnetization of the nanomagnet is reversed. This indicates a variation in spin-orbit interaction strength depending on whether the magnetic field penetrates the interface from a ferromagnetic to a non-magnetic metal or vice versa. Systematic measurements of over 100 nanomagnets revealed a consistent, yet unexpected, pattern between variations in magnetic anisotropy and spin-orbit interactions with magnetization reversal. These changes align along a single straight line with a negative slope, suggesting a complex and indirect relationship. Our findings also suggest the presence of an additional, yet-to-be-identified effect that influences the change in magnetic anisotropy with magnetization reversal, beyond the variations in spin-orbit interaction strength. This finding highlights the complexity of magnetic behavior at the nanoscale and the critical role of magnetization direction in determining anisotropic properties.

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Vadym Zayets. 2024-07-09. Dependence of strength of spin-orbit interaction on polarity of interface. https://arxiv.org/abs/2407.06574

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