Magnetoelastic dissipation in macroscopic magnetization tunneling

Anupam K Garg; Gwang Hee Kim

doi:10.1103/PhysRevB.43.712

Magnetoelastic dissipation in macroscopic magnetization tunneling

Anupam K Garg^*, Gwang Hee Kim

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

The tunneling of the total magnetization of a small (100-) magnetic particle out of a metastable easy direction is a promising candidate for macroscopic quantum tunneling. It is shown that the coupling of the magnetization to the phonons is an extremely weak source of dissipation that does not reduce the tunneling rate. A model in which the magnetic particle is embedded in a solid medium is considered, and the spectral density is derived for various crystal symmetries.

Original language	English (US)
Pages (from-to)	712-718
Number of pages	7
Journal	Physical Review B
Volume	43
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.43.712
State	Published - Jan 1 1991

ASJC Scopus subject areas

Condensed Matter Physics

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10.1103/PhysRevB.43.712

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title = "Magnetoelastic dissipation in macroscopic magnetization tunneling",

abstract = "The tunneling of the total magnetization of a small (100-) magnetic particle out of a metastable easy direction is a promising candidate for macroscopic quantum tunneling. It is shown that the coupling of the magnetization to the phonons is an extremely weak source of dissipation that does not reduce the tunneling rate. A model in which the magnetic particle is embedded in a solid medium is considered, and the spectral density is derived for various crystal symmetries.",

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AB - The tunneling of the total magnetization of a small (100-) magnetic particle out of a metastable easy direction is a promising candidate for macroscopic quantum tunneling. It is shown that the coupling of the magnetization to the phonons is an extremely weak source of dissipation that does not reduce the tunneling rate. A model in which the magnetic particle is embedded in a solid medium is considered, and the spectral density is derived for various crystal symmetries.

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Magnetoelastic dissipation in macroscopic magnetization tunneling

Abstract

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