Giant enhancement of spin accumulation and long-distance spin precession in metallic lateral spin valves

Yasuhiro Fukuma, Le Wang, Hiroshi Idzuchi, Saburo Takahashi, Sadamichi Maekawa, Yoshichika Otani

Research output: Contribution to journalArticle

147 Citations (Scopus)

Abstract

The non-local spin injection in lateral spin valves is strongly expected to be an effective method to generate a pure spin current for potential spintronic application. However, the spin-valve voltage, which determines the magnitude of the spin current flowing into an additional ferromagnetic wire, is typically of the order of 1μV. Here we show that lateral spin valves with low-resistivity NiFe/MgO/Ag junctions enable efficient spin injection with high applied current density, which leads to the spin-valve voltage increasing 100-fold. Hanle effect measurements demonstrate a long-distance collective 2π spin precession along a 6-μm-long Ag wire. These results suggest a route to faster and manipulable spin transport for the development of pure spin-current-based memory, logic and sensing devices.

Original languageEnglish
Pages (from-to)527-531
Number of pages5
JournalNature Materials
Volume10
Issue number7
DOIs
Publication statusPublished - 2011 Jul

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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