Dissipation in macroscopic magnetization tunneling

Anupam K Garg*, Gwang Hee Kim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

The effect of magnetoelastic dissipation upon the tunneling and coherence of the total magnetization in small (1/4100 A) single-domain ferromagnetic particles is investigated. Such tunneling would be an example of a macroscopic quantum phenomenon. It is shown that the dissipation has a super-Ohmic spectral density, J()1/43, and that the dissipation is weak for reasonable material parameters. Corrections to the rates, and the damping rate for coherent oscillations are obtained. A key feature is the inclusion of the elastic waves in the medium surrounding the particle.

Original languageEnglish (US)
Pages (from-to)2512-2515
Number of pages4
JournalPhysical Review Letters
Volume63
Issue number22
DOIs
StatePublished - Jan 1 1989

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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