Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet α-Fe2O3
Lebrun R, Ross A, Gomonay O, Baltz V, Ebels U, Barra AL, Qaiumzadeh A, Brataas A, Sinova J, Klaeui M (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 11
Article Number: 6332
Journal Issue: 1
DOI: 10.1038/s41467-020-20155-7
Abstract
Antiferromagnetic materials can host spin-waves with polarizations ranging from circular to linear depending on their magnetic anisotropies. Until now, only easy-axis anisotropy antiferromagnets with circularly polarized spin-waves were reported to carry spin-information over long distances of micrometers. In this article, we report long-distance spin-transport in the easy-plane canted antiferromagnetic phase of hematite and at room temperature, where the linearly polarized magnons are not intuitively expected to carry spin. We demonstrate that the spin-transport signal decreases continuously through the easy-axis to easy-plane Morin transition, and persists in the easy-plane phase through current induced pairs of linearly polarized magnons with dephasing lengths in the micrometer range. We explain the long transport distance as a result of the low magnetic damping, which we measure to be ≤ 10−5 as in the best ferromagnets. All of this together demonstrates that long-distance transport can be achieved across a range of anisotropies and temperatures, up to room temperature, highlighting the promising potential of this insulating antiferromagnet for magnon-based devices.
Involved external institutions
École Polytechnique - Université Paris-Saclay
France (FR)
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
University of Grenoble Alpes (UGA) / Université de Grenoble
France (FR)
NTNU Trondheim - Norwegian University of Science and Technology
Norway (NO)
France (FR)
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
University of Grenoble Alpes (UGA) / Université de Grenoble
France (FR)
NTNU Trondheim - Norwegian University of Science and Technology
Norway (NO)
How to cite
APA:
Lebrun, R., Ross, A., Gomonay, O., Baltz, V., Ebels, U., Barra, A.-L.,... Klaeui, M. (2020). Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet α-Fe2O3. Nature Communications, 11(1). https://doi.org/10.1038/s41467-020-20155-7
MLA:
Lebrun, Romain, et al. "Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet α-Fe2O3." Nature Communications 11.1 (2020).
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