Giant spin hall effect in perpendicularly spin-polarized FePt/Au devices

Takeshi Seki, Yu Hasegawa, Seiji Mitani, Saburo Takahashi, Hiroshi Imamura, Sadamichi Maekawa, Junsaku Nitta, Koki Takanashi

Research output: Contribution to journalArticle

315 Citations (Scopus)

Abstract

Conversion of charge current into pure spin current and vice versa in non-magnetic semiconductors or metals, which are called the direct and inverse spin Hall effects (SHEs), provide a new functionality of materials for future spin-electronic architectures. Thus, the realization of a large SHE in a device with a simple and practical geometry is a crucial issue for its applications. Here, we present a multi-terminal device with a Au Hall cross and an FePt perpendicular spin injector to detect giant direct and inverse SHEs at room temperature. Perpendicularly magnetized FePt injects or detects perpendicularly polarized spin current without magnetic field, enabling the unambiguous identification of SHEs. The unprecedentedly large spin Hall resistance of up to 2.9m is attributed to the large spin Hall angle in Au through the skew scattering mechanism and the highly efficient spin injection due to the well-matched spin resistances of the chosen materials.

Original languageEnglish
Pages (from-to)125-129
Number of pages5
JournalNature Materials
Volume7
Issue number2
DOIs
Publication statusPublished - 2008 Feb

ASJC Scopus subject areas

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

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