Four-terminal nonlocal signals in lateral spin transport devices with variously ordered Co2FeAl0.5Si0.5 full-Heusler alloy electrodes

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Abstract

The structural ordering of the Co2FeAl0.5Si 0.5 (CFAS) full-Heusler alloy, the electrical transport properties, and the four-terminal (4T) nonlocal signals were investigated in lateral spin transport devices with CFAS/n-GaAs Schottky tunnel junctions as a function of the deposition temperature of CFAS (TCFAS). The 4T nonlocal signals increased with increasing TCFAS, in contrast to the trend in three-terminal Hanle measurements [Jpn. J. Appl. Phys., Part 1 52, 063001 (2013)]. No relationship between interface resistance and 4T nonlocal signal was confirmed, indicating that conductance mismatch problems did not affect the tendency of signal values.

Original languageEnglish
Article number122401
JournalApplied Physics Letters
Volume103
Issue number12
DOIs
Publication statusPublished - 2013 Sep 16

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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