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25 September 2022
  » arxiv » 1911.6061

 Article overview

Absence of spin transport through amorphous Y$_3$Fe$_5$O$_{12}$
Juan M. Gomez-Perez ; Koichi Oyanagi ; Reimei Yahiro ; Rafael Ramos ; Luis E. Hueso ; Eiji Saitoh ; Fèlix Casanova ;
Date 14 Nov 2019
AbstractLong-distance transport of spin information in insulators without magnetic long-range-order has been recently reported. Here, we perform a complete characterization of amorphous Y$_3$Fe$_5$O$_{12}$ (a-YIG) films grown on top of SiO$_2$. We confirm a clear amorphous structure and paramagnetic behavior of our a-YIG films, with semiconducting behavior resistivity that strongly decays with increasing temperature. The non-local transport measurements show a signal which is not compatible with spin transport and can be attributed to the drop of the a-YIG resistivity caused by Joule heating. Our results emphasize that exploring spin transport in amorphous materials requires careful procedures in order to exclude the charge contribution from the spin transport signals.
Source arXiv, 1911.6061
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