Nonlocal magnon spin transport in NiFe2O4 thin films

J. Shan, P. Bougiatioti, L. Liang, G. Reiss, T. Kuschel, B. J. van Wees

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31 Citaten (Scopus)
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We report magnon spin transport in nickel ferrite(NiFe2O4, NFO)/platinum (Pt) bilayer systems at room temperature. A nonlocal geometry is employed, where the magnons are excited by the spin Hall effect or by the Joule heating induced spin Seebeck effect at the Pt injector and detected at a certain distance away by the inverse spin Hall effect at the Pt detector. The dependence of the nonlocal magnon spin signals as a function of the magnetic field is closely related to the NFO magnetization behavior. In contrast, we observe that the magnetoresistance measured locally at the Pt injector does not show a clear relationship with the average NFO magnetization. We obtain a magnon spin relaxation length of 3.1 ± 0.2 μm in the investigated NFO samples.
Originele taal-2English
Aantal pagina's5
TijdschriftApplied Physics Letters
Nummer van het tijdschrift13
StatusPublished - 30-mrt-2017

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