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.
@article{arxiv.2410.08013,
title = {Probing nonlinear spin dynamics in canted easy-plane antiferromagnets using spin-rectification effects},
author = {A. El Kanj and S. Mantion and I. Boventer and P. Bortolotti and V. Cros and A. Anane and O. Gomonay and R. Lebrun},
journal= {arXiv preprint arXiv:2410.08013},
year = {2024}
}