Charge pumping and the colored thermal voltage noise in spin valves

Jiang Xiao, Gerrit E.W. Bauer, Sadamichi Maekawa, Arne Brataas

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Spin pumping by a moving magnetization gives rise to an electric voltage over a spin valve. Thermal fluctuations of the magnetization manifest themselves as increased thermal voltage noise with absorption lines at the ferromagnetic resonance frequency and/or zero frequency. The effect depends on the magnetization configuration and can be of the same order of magnitude as the Johnson-Nyquist thermal noise. Measuring colored voltage noise is an alternative to ferromagnetic resonance experiments for nanoscale ferromagnetic circuits.

Original languageEnglish
Article number174415
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number17
DOIs
Publication statusPublished - 2009 May 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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