Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet alpha-Fe.sub.2./sub.O.sub.3./sub.

0541000 - FZÚ 2021 RIV GB eng J - Článek v odborném periodiku
Lebrun, R. - Ross, A. - Gomonay, O. - Baltz, V. - Ebels, U. - Barra, A. L. - Qaiumzadeh, A. - Brataas, A. - Sinova, Jairo - Klaeui, M.
Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet alpha-Fe₂O₃.
Nature Communications. Roč. 11, č. 1 (2020), s. 1-7, č. článku 6332. E-ISSN 2041-1723
Institucionální podpora: RVO:68378271
Klíčová slova: antiferromagnets (AFMs) * Morin transition * spin-waves * easy-axis anisotropy antiferromagnets
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 14.919, rok: 2020
Způsob publikování: Open access

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.

Trvalý link: http://hdl.handle.net/11104/0318577