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

Y. B. Band, Y. Avishai, and Alexander Shnirman
Phys. Rev. Lett. 121, 160801 – Published 17 October 2018
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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.

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  • Received 12 April 2018
  • Revised 31 August 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.160801

© 2018 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
General Physics

Authors & Affiliations

Y. B. Band1,2, Y. Avishai2,3,4, and Alexander Shnirman3,5,6

  • 1Department of Chemistry, Department of Physics, Department of Electro-Optics, and the Ilse Katz Center for Nano-Science, Ben-Gurion University, Beer-Sheva 84105, Israel
  • 2New York University and the NYU-ECNU Institute of Physics at NYU Shanghai, 3663 Zhongshan Road North, Shanghai 200062, China
  • 3Department of Physics and the Ilse Katz Center for Nano-Science, Ben-Gurion University, Beer-Sheva 84105, Israel
  • 4Yukawa Institute for Theoretical Physics, Kyoto 606-8502, Japan
  • 5Institut für Theorie der Kondensierten Materie, Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany
  • 6Institute of Nanotechnology, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany

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Issue

Vol. 121, Iss. 16 — 19 October 2018

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