Absence of evidence of spin transport through amorphous Y${}_3$Fe${}_5$O${}_{12}$

Abstract

Long-distance transport of spin information in insulators without long-range magnetic 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.

10 pages, 4 figures

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Cited by in corpus (4)

• Magnetic texture based magnonics
• Role of NiO in the nonlocal spin transport through thin NiO films on Y${}_3$Fe${}_5$O${}_{12}$
• Non-local magnon-based transport in yttrium iron garnet/platinum heterostructures at high temperatures
• Magnon Spectrum of the Amorphous Ferromagnet Co${}_4$P from Atomistic Spin Dynamics