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arXiv · 2410.08013

Probing nonlinear spin dynamics in canted easy-plane antiferromagnets using spin-rectification effects

A. El Kanj·S. Mantion·I. Boventer·P. Bortolotti·V. Cros·A. Anane·O. Gomonay·R. Lebrun
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Abstract

We investigate spin-rectification phenomena in canted antiferromagnets, closely connected to the family of altermagnetic materials. Our results show that excitation efficiency is significantly enhanced by the Dzyaloshinskii-Moriya interaction. Antiferromagnetic dynamics can be detected through spin-Hall magnetoresistance and bolometric effects, with an efficiency reaching up to mV/W. The rectified voltage shape is influenced by both the symmetry of the exciting torques, detection mechanisms (continuous spin-pumping and spin-Hall magnetoresistance), and the antiferromagnetic crystalline axis. Under high pumping power, we observe a saturation effect related to Suhl-like spin-wave instabilities and a nonlinear redshift of the antiferromagnetic resonance. These findings open new avenues for studying nonlinear dynamics in antiferromagnetic and altermagnetic spintronic devices.

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A. El Kanj, S. Mantion, I. Boventer, P. Bortolotti, V. Cros, A. Anane, O. Gomonay, R. Lebrun. 2024-10-10. Probing nonlinear spin dynamics in canted easy-plane antiferromagnets using spin-rectification effects. https://arxiv.org/abs/2410.08013

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