Rate-dependent coercivity and activation volumes in nanocrystalline FeZrBCu alloys

V. Basso, C. Beatrice, M. LoBue, P. Tiberto, G. Bertotti, R. Grossinger, Djoko Triyono

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In nanocrystalline grain/amorphous matrix systems well above the Curie temperature of the amorphous part, the system does not behave like a system of superparamagnetic particles, as it should be at those temperatures, but still exhibits hysteresis. This effect could be explained by invoking the existence of some correlation length larger then the grain size. Since thermal activation is connected to a typical activation volume, this correlation length may also be estimated by studying the rate dependence of hysteresis properties. We have applied this method to the study of Fe86Zr7B6Cu1 ribbons. Hysteresis loops have been measured as a function of temperature and crystalline fraction. The coercivity was studied as a function of the field rate in the range 102-107 Am-1 s-1.

Original languageEnglish
Title of host publicationINTERMAG Europe 2002 - IEEE International Magnetics Conference
EditorsJ. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, Jo De Boeck, R. Wood
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)0780373650, 9780780373655
DOIs
Publication statusPublished - 1 Jan 2002
Event2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 - Amsterdam, Netherlands
Duration: 28 Apr 20022 May 2002

Publication series

NameINTERMAG Europe 2002 - IEEE International Magnetics Conference

Conference

Conference2002 IEEE International Magnetics Conference, INTERMAG Europe 2002
CountryNetherlands
CityAmsterdam
Period28/04/022/05/02

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