Distinguishing local moment versus itinerant ferromagnets: Dynamic magnetic susceptibility

TitleDistinguishing local moment versus itinerant ferromagnets: Dynamic magnetic susceptibility
Publication TypeJournal Article
Year of Publication2008
AuthorsVannette MD, Bud'ko SL, Canfield PC, Prozorov R
Journal TitleJournal of Applied Physics
Volume103
Pages07D302
Date PublishedApr
Type of ArticleProceedings Paper
ISBN Number0021-8979
Accession NumberISI:000255043200423
Keywordsnd, SM, tunnel-diode oscillator
Abstract

Radio-frequency measurements of dynamic magnetic susceptibility of various ferromagnets show striking differences between local-moment ferromagnetism (LFM) and weak itinerant ferromagnetism (IFM) ferromagnetic systems. LFMs show a very sharp peak in susceptibility in the vicinity of the Curie temperature T-C that rapidly decreases in amplitude and shifts to higher temperature with the application of a weak dc bias field. In stark contrast, the generally accepted IFM systems show no peak, but rather a broad maximum well below T-C. The temperature of this maximum shifts to lower values and the amplitude is suppressed with an applied dc field. (c) 2008 American Institute of Physics.

DOI10.1063/1.2832349
Alternate JournalJ. Appl. Phys.