Dipole-dipole interaction in superparamagnetic nanocrystalline Fe63.5Cr10Si13.5B9Cu 1Nb3

V. Franco, C. F. Conde, A. Conde, L. F. Kiss, D. Kaptás, T. Kemény, I. Vincze

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Cr-substituted Finemet-type nanocrystalline alloy (Fe63.5Cr10Si13.5B9Cu 1Nb3) has been studied by differential scanning calorimetry, x-ray diffraction, Mössbauer spectroscopy, and magnetic measurements. The Curie temperature of the remaining amorphous phase decreases as the crystalline volume fraction increases, reaching values below room temperature. This feature makes the alloy adequate for studying the magnetic decoupling of the (Fe,Si) nanocrystals at moderated temperatures and, in particular, the superparamagnetic relaxation in broad temperature and crystalline fraction ranges. It was shown that the anomalous dependence of the coercive field on the annealing temperature can be satisfactorily explained assuming a dipolar-type interaction between the crystallites.

Original languageEnglish
Pages (from-to)1558-1563
Number of pages6
JournalJournal of Applied Physics
Volume90
Issue number3
DOIs
Publication statusPublished - Aug 1 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Dipole-dipole interaction in superparamagnetic nanocrystalline Fe<sub>63.5</sub>Cr<sub>10</sub>Si<sub>13.5</sub>B<sub>9</sub>Cu <sub>1</sub>Nb<sub>3</sub>'. Together they form a unique fingerprint.

  • Cite this