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http://doi.org/10.25358/openscience-6288| Authors: | Ross, Andrew Lebrun, Romain Evers, Martin Deák, András Szunyogh, László Nowak, Ulrich Kläui, Mathias |
| Title: | Exceptional sign changes of the nonlocal spin Seebeck effect in antiferromagnetic hematite |
| Online publication date: | 20-Aug-2021 |
| Year of first publication: | 2021 |
| Language: | english |
| Abstract: | Low-power spintronic devices based on the propagation of pure magnonic spin currents in antiferromagnetic insulator materials offer several distinct advantages over ferromagnetic components including higher-frequency magnons and a stability against disturbing external magnetic fields. In this work, we make use of the insulating antiferromagnetic phase of iron oxide, the mineral hematite alpha-Fe2O3 to investigate the long-distance transport of thermally generated magnonic spin currents. We report on the excitation of magnons generated by the spin Seebeck effect, transported both parallel and perpendicular to the antiferromagnetic easy-axis under an applied magnetic field. Making use of an atomistic hematite toy model, we calculate the transport characteristics from the deviation of the antiferromagnetic ordering from equilibrium under an applied field. We resolve the role of the magnetic order parameters in the transport, and experimentally we find significant thermal spin transport without the need for a net magnetization. |
| 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-6288 |
| Version: | Accepted version |
| Publication type: | Zeitschriftenaufsatz |
| Document type specification: | Scientific article |
| License: | In Copyright |
| Information on rights of use: | http://rightsstatements.org/vocab/InC/1.0/ |
| Journal: | Physical review : B 103 22 |
| Pages or article number: | 224433 |
| Publisher: | American Physical Society |
| Publisher place: | Ridge, NY |
| Issue date: | 2021 |
| ISSN: | 2469-9950 |
| Publisher URL: | https://doi.org/10.1103/PhysRevB.103.224433 |
| Publisher DOI: | 10.1103/PhysRevB.103.224433 |
| Appears in collections: | JGU-Publikationen |
Files in This Item:
| File | Description | Size | Format | ||
|---|---|---|---|---|---|
 | ross_andrew-exceptional_si-20210816133558222.pdf | 2.42 MB | Adobe PDF | View/Open |