Geometrical dependence of spin current absorption into a ferromagnetic nanodot

Tatsuya Nomura, Kohei Ohnishi, Takashi Kimura

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Abstract

We have investigated the absorption property of the diffusive pure spin current due to a ferromagnetic nanodot in a laterally configured ferromagnetic/nonmagnetic hybrid nanostructure. The spin absorption in a nano-pillar-based lateral-spin-valve structure was confirmed to increase with increasing the lateral dimension of the ferromagnetic dot. However, the absorption efficiency was smaller than that in a conventional lateral spin valve based on nanowire junctions because the large effective cross section of the two dimensional nonmagnetic film reduces the spin absorption selectivity. We also found that the absorption efficiency of the spin current is significantly enhanced by using a thick ferromagnetic nanodot. This can be understood by taking into account the spin absorption through the side surface of the ferromagnetic dot quantitatively.

Original languageEnglish
Article number142121
JournalJournal of Applied Physics
Volume120
Issue number14
DOIs
Publication statusPublished - Oct 14 2016

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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