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 |
Year of first publication: | 2020 |
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 |
ROR: | https://ror.org/023b0x485 |
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 URL: | https://doi.org/10.1063/5.0032940 |
Publisher DOI: | 10.1063/5.0032940 |
Appears in collections: | JGU-Publikationen |
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