Temperature dependence of the high-field magnetization in Fe-Ag granular alloys and discontinuous multilayers

L. F. Kiss, J. Balogh, L. Bujdosó, D. Kapts, F. Tanczikó, I. Vincze

Research output: Contribution to journalConference article

Abstract

Fe-Ag co-deposited granular alloy and discontinuous multilayer samples with 10-36 at% Fe average compositions were prepared by vacuum evaporation onto Si(111) single crystal substrates at room temperature. The magnetic properties of the samples were studied by SQUID and in-field Mössbauer spectroscopy. Superparamagnetic behaviour was observed for all the samples with blocking temperatures (TB) steeply increasing with increasing Fe concentration. The bulk magnetization (M) measured in 5 T shows linear temperature dependence for both types of samples, and the relative decrease with temperature is much larger for a granular alloy than for a multilayer sample of equal TB. The Mössbauer spectroscopy results indicate that the faster decrease of the high field magnetization in granular alloys is explained by the larger amount of small grains that are not aligned by the 5 T field.

Original languageEnglish
Article number072050
JournalJournal of Physics: Conference Series
Volume200
Issue numberSECTION 7
DOIs
Publication statusPublished - Jan 1 2010

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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