Temperature dependence of magnetic hysteresis of RCo x:Co nanocomposites (R=Pr and Sm)

J. P. Liu, R. Skomski, Y. Liu, David J Sellmyer

Research output: Contribution to journalConference article

28 Citations (Scopus)

Abstract

The temperature dependence of magnetic hysteresis of RCo x:Co (R=Pr and Sm) nanocomposite films is reported. These films are prepared by dc and rf sputtering and subsequent thermal processing. It is found that the squareness of the hysteresis loops deteriorates with decreasing temperature. This is attributed to the enhanced magnetic anisotropy of the hard phases at low temperatures. The analysis of the magnetic reversal process shows that the anisotropy enhancement leads to a transition from cooperated to independent behavior. This analysis agrees well with the experimental results.

Original languageEnglish (US)
Pages (from-to)6740-6742
Number of pages3
JournalJournal of Applied Physics
Volume87
Issue number9 III
StatePublished - May 1 2000
Event44th Annual Conference on Magnetism and Magnetic Materials - San Jose, CA, United States
Duration: Nov 15 1999Nov 18 1999

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nanocomposites
hysteresis
temperature dependence
anisotropy
sputtering
augmentation
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Temperature dependence of magnetic hysteresis of RCo x:Co nanocomposites (R=Pr and Sm). / Liu, J. P.; Skomski, R.; Liu, Y.; Sellmyer, David J.

In: Journal of Applied Physics, Vol. 87, No. 9 III, 01.05.2000, p. 6740-6742.

Research output: Contribution to journalConference article

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AB - The temperature dependence of magnetic hysteresis of RCo x:Co (R=Pr and Sm) nanocomposite films is reported. These films are prepared by dc and rf sputtering and subsequent thermal processing. It is found that the squareness of the hysteresis loops deteriorates with decreasing temperature. This is attributed to the enhanced magnetic anisotropy of the hard phases at low temperatures. The analysis of the magnetic reversal process shows that the anisotropy enhancement leads to a transition from cooperated to independent behavior. This analysis agrees well with the experimental results.

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