Slow magnetic relaxation in iron: A ferromagnetic liquid

Ralph Chamberlin, M. R. Scheinfein

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

The remanent magnetization of single-crystal iron whiskers has been measured from 10-5 to 104 seconds after the removal of an applied field. The observed response is accurately modeled by localized magnon relaxation on a Gaussian size distribution of dynamically correlated domains, virtually identical to the distribution of excitations in glass-forming liquids. When fields of less than 1 oersted are removed, some relaxation occurs before 10-5 second has elapsed; but when larger fields are removed, essentially all of the response can be accounted for by magnon relaxation over the available time window. The model provides a physical picture for the mechanism and observed distribution of Landau-Lifshitz damping parameters.

Original languageEnglish (US)
Pages (from-to)1098-1101
Number of pages4
JournalScience
Volume260
Issue number5111
DOIs
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • General

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