Isothermal entropy changes in nanocomposite Co:Ni 67Cu 33

S. Michalski, R. Skomski, X. Zh Li, D. Le Roy, T. Mukherjee, Ch Binek, D. J. Sellmyer

Research output: Contribution to journalArticle

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Abstract

The temperature-dependent magnetic properties of artificial rare-earth, free-magnetic nanostructures are investigated for magnetic cooling. We consider two-phase nanocomposites, where 2 nm nanoclusters of cobalt are embedded in a Ni 67Cu 33 matrix. Several composite films were produced by cluster deposition. The average Co nanocluster size can be tuned by varying the deposition conditions. Isothermal magnetization curves were measured at various temperatures 150 K < T < 340 K in steps of 10 K. The isothermal entropy changes δS were calculated using the Maxwell relation. The entropy changes measured were, -δS 0.15 J/kgK in a field change of 1 T at 260 K and 0.72 J/kgK in a field change of 7 T at 270 K.

Original languageEnglish (US)
Article number07A930
JournalJournal of Applied Physics
Volume111
Issue number7
DOIs
StatePublished - Apr 1 2012

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nanoclusters
nanocomposites
magnetic cooling
entropy
cobalt
rare earth elements
magnetic properties
magnetization
composite materials
temperature
curves
matrices

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Michalski, S., Skomski, R., Li, X. Z., Le Roy, D., Mukherjee, T., Binek, C., & Sellmyer, D. J. (2012). Isothermal entropy changes in nanocomposite Co:Ni 67Cu 33 Journal of Applied Physics, 111(7), [07A930]. https://doi.org/10.1063/1.3676423

Isothermal entropy changes in nanocomposite Co:Ni 67Cu 33 . / Michalski, S.; Skomski, R.; Li, X. Zh; Le Roy, D.; Mukherjee, T.; Binek, Ch; Sellmyer, D. J.

In: Journal of Applied Physics, Vol. 111, No. 7, 07A930, 01.04.2012.

Research output: Contribution to journalArticle

Michalski, S, Skomski, R, Li, XZ, Le Roy, D, Mukherjee, T, Binek, C & Sellmyer, DJ 2012, 'Isothermal entropy changes in nanocomposite Co:Ni 67Cu 33 ', Journal of Applied Physics, vol. 111, no. 7, 07A930. https://doi.org/10.1063/1.3676423
Michalski S, Skomski R, Li XZ, Le Roy D, Mukherjee T, Binek C et al. Isothermal entropy changes in nanocomposite Co:Ni 67Cu 33 Journal of Applied Physics. 2012 Apr 1;111(7). 07A930. https://doi.org/10.1063/1.3676423
Michalski, S. ; Skomski, R. ; Li, X. Zh ; Le Roy, D. ; Mukherjee, T. ; Binek, Ch ; Sellmyer, D. J. / Isothermal entropy changes in nanocomposite Co:Ni 67Cu 33 In: Journal of Applied Physics. 2012 ; Vol. 111, No. 7.
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