Dynamics of a Magnetic Needle Magnetometer: Sensitivity to Landau-Lifshitz-Gilbert Damping

Y. B. Band, Y. Avishai, Alexander Shnirman

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

An analysis of a single-domain magnetic needle (MN) in the presence of an external magnetic field B is carried out with the aim of achieving a high-precision magnetometer. We determine the uncertainty ΔB of such a device due to Gilbert dissipation and the associated internal magnetic field fluctuations that give rise to diffusion of the MN axis direction n and the needle orbital angular momentum. The levitation of the MN in a magnetic trap and its stability are also analyzed.

Original languageEnglish
Article number160801
JournalPhysical Review Letters
Volume121
Issue number16
DOIs
StatePublished - 17 Oct 2018

ASJC Scopus subject areas

  • General Physics and Astronomy

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