Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-5547
Authors: Ross, Andrew
Lebrun, Romain
Baldrati, Lorenzo
Kamra, Akashdeep
Gomonay, Olena
Ding, Shilei
Schreiber, Felix
Backes, Dirk
Maccherozzi, Francesco
Grave, Daniel A.
Rothschild, Avner
Sinova, Jairo
Kläui, Mathias
Title: An insulating doped antiferromagnet with low magnetic symmetry as a room temperature spin conduit
Online publication date: 12-Jan-2021
Language: english
Abstract: We report room-temperature long-distance spin transport of magnons in antiferromagnetic thin-film hematite doped with Zn. The additional dopants significantly alter the magnetic anisotropies, resulting in a complex equilibrium spin structure that is capable of efficiently transporting spin angular momentum at room temperature without the need for a well-defined, pure easy-axis or easy-plane anisotropy. We find intrinsic magnon spin-diffusion lengths of up to 1.5 mu m, and magnetic domain governed decay lengths of 175nm for the low-frequency magnons, through electrical transport measurements demonstrating that the introduction of nonmagnetic dopants does not strongly reduce the transport length scale, showing that the magnetic damping of hematite is not significantly increased. We observe a complex field dependence of the nonlocal signal independent of the magnetic state visible, in the local magnetoresistance and direct magnetic imaging of the antiferromagnetic domain structure. We explain our results in terms of a varying and applied field-dependent ellipticity of the magnon modes reaching the detector electrode allowing us to tune the spin transport. Published under license by AIP Publishing.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
DOI: http://doi.org/10.25358/openscience-5547
Version: Accepted version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: in Copyright
Information on rights of use: https://rightsstatements.org/page/InC/1.0/?language=en
Journal: Applied physics letters
117
24
Pages or article number: 242405
Publisher: American Inst. of Physics
Publisher place: Melville, NY
Issue date: 2020
ISSN: 0003-6951
Publisher's URL: https://doi.org/10.1063/5.0032940
Appears in collections:JGU-Publikationen

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