1. Non-local magnon transport in the compensated ferrimagnet GdIG
- Author
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Ganzhorn, Kathrin, Wimmer, Tobias, Barker, Joseph, Bauer, Gerrit E. W., Qiu, Zhiyong, Saitoh, Eiji, Vlietstra, Nynke, Geprägs, Stephan, Gross, Rudolf, Huebl, Hans, and Goennenwein, Sebastian T. B.
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We study the diffusive transport of magnons through the compensated ferrimagnetic insulator Gd3Fe5O12 (GdIG). The magnons are injected and detected electrically in a non-local measurement configuration via two parallel Pt strips deposited on top of the ferrimagnet. GdIG exhibits a rich magnon spectrum, with several thermally populated magnon bands at room temperature. We observe a strong temperature and field dependence of the non-local voltage in the detector strip. Just below the magnetization compensation temperature we find that the increasing magnetic field causes an unexpected enhancement of the non-local signal. A comparison with GdIG spin wave spectra obtained from atomistic modeling indicates that the thermal magnon population is important for understanding the non-local voltage signal.
- Published
- 2017