Observation of Antiferromagnetic Magnon Pseudospin Dynamics and the Hanle effect

Abstract

We report on experiments demonstrating coherent control of magnon spin transport and pseudospin dynamics in a thin film of the antiferromagnetic insulator hematite utilizing two Pt strips for all-electrical magnon injection and detection. The measured magnon spin signal at the detector reveals an oscillation of its polarity as a function of the externally applied magnetic field. We quantitatively explain our experiments in terms of diffusive magnon transport and a coherent precession of the magnon pseudospin caused by the easy-plane anisotropy and the Dzyaloshinskii-Moriya interaction. This experimental observation can be viewed as the magnonic analogue of the electronic Hanle effect and the Datta-Das transistor, unlocking the high potential of antiferromagnetic magnonics towards the realization of rich electronics-inspired phenomena.

arXiv comment6 pages, 3 figures

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Cited by in corpus (35)

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• Boosting spintronics with superconductivity
• Observation of nonreciprocal magnon Hanle effect
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• Generation of spin-triplet Cooper pairs via a canted antiferromagnet
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