Large spatial distribution of spin accumulation in wide Au channel

Jang Hae Ku, Hyun Cheol Koo, Suk Hee Han, Jonghwa Eom, Gyutae Kim, Joonyeon Chang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Non local spin valve measurements for lateral Permalloy(Py)/Au/Py spin valve devices with various Au channel widths were carried out in two viable voltage probe configurations. With increasing the channel width at a fixed channel length, the magnitude of spin valve signal (ΔR) decays for both configurations. Non-zero ΔR is observed up to 3 μm in width while no spin signal is observed even narrower width of 0.7 μm when the current and voltage probes are located on the same side or opposite side with respect to the current path respectively. The magnitude of ΔR is strongly affected by the location of voltage probe on both ends of the detector as well as channel width. Large spatial distribution of spin current is initiated from inhomogeneous spin injection close to the current path and can be well understood by introducing the effective channel length.

Original languageEnglish
Pages (from-to)72-75
Number of pages4
JournalSolid-State Electronics
Volume89
DOIs
Publication statusPublished - 2013

Keywords

  • Non-local measurement
  • Spin accumulation
  • Spin injection
  • Spin valve device

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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