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 journalArticlepeer-review

3 Citations (Scopus)


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
Publication statusPublished - 2013

Bibliographical note

Funding Information:
This work was supported by KIST Institutional program (2E22402, 2V02720) and the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MEST) (No. 2012-0005631).


  • 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


Dive into the research topics of 'Large spatial distribution of spin accumulation in wide Au channel'. Together they form a unique fingerprint.

Cite this