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06 January 2025
 
  » arxiv » cond-mat/9307012

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Macroscopic Quantum Tunneling of a Domain Wall in a Ferromagnetic Metal
Gen Tatara ; Hidetoshi Fukuyama ;
Date 8 Jul 1993
Subject cond-mat
AffiliationDepartment of Physics, University of Tokyo, 7-3-1 Hongo, Tokyo 113, Japan
AbstractThe macroscopic quantum tunneling of a planar domain wall in a ferromagnetic metal is studied based on the Hubbard model. It is found that the ohmic dissipation is present even at zero temperature due to the gapless Stoner excitation, which is the crucial difference from the case of the insulating magnet. The dissipative effect is calculated as a function of width of the wall and is shown to be effective in a thin wall and in a weak ferromagnet. The results are discussed in the light of recent experiments on ferromagnets with strong anisotropy. PACS numbers:75.60.Ch, 03.65.Sq, 75.10.Lp
Source arXiv, cond-mat/9307012
Other sources [GID 479223] cond-mat/9402050 pmid10056519
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