Magnetization noise in magnetoelectronic nanostructures

Jørn Foros, Arne Brataas, Yaroslav Tserkovnyak, Gerrit E.W. Bauer

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)


By scattering theory we show that spin current noise in normal electric conductors in contact with nanoscale ferromagnets increases the magnetization noise by means of a fluctuating spin-transfer torque. Johnson-Nyquist noise in the spin current is related to the increased Gilbert damping due to spin pumping, in accordance with the fluctuation-dissipation theorem. Spin current shot noise in the presence of an applied bias is the dominant contribution to the magnetization noise at low temperatures.

Original languageEnglish
Article number016601
JournalPhysical Review Letters
Issue number1
Publication statusPublished - 2005 Jul 1


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