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Title

Analysis of the magnetocaloric effect in Heusler alloys: study of Ni50CoMn36Sn13 by calorimetric techniques

AuthorsPalacios, Elias; Bartolomé, Juan; Wang, GaoFeng; Burriel, Ramón; Skokov, Konstantin P.; Taskaev, Sergey; Khovaylo, Vladimir
KeywordsHeusler alloys
Magnetocaloric effect
Thermal hysteresis
Heat capacity
Issue Date2015
PublisherMultidisciplinary Digital Publishing Institute
CitationEntropy 17(3): 1236-1252 (2015)
AbstractDirect determinations of the isothermal entropy increment, −ΔST, in the Heusler alloy Ni50CoMn36Sn13 on demagnetization gave positive values, corresponding to a normal magnetocaloric effect. These values contradict the results derived from heat-capacity measurements and also previous results obtained from magnetization measurements, which indicated an inverse magnetocaloric effect, but showing different values depending on the technique employed. The puzzle is solved, and the apparent incompatibilities are quantitatively explained considering the hysteresis, the width of the martensitic transition and the detailed protocol followed to obtain each datum. The results show that these factors should be analyzed in detail when dealing with Heusler alloys.
DescriptionThis is an open access article distributed under the Creative Commons Attribution License.
Publisher version (URL)http://dx.doi.org/10.3390/e17031236
URIhttp://hdl.handle.net/10261/147522
DOI10.3390/e17031236
Identifiersdoi: 10.3390/e17031236
e-issn: 1099-4300
Appears in Collections:(ICMA) Artículos
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