2024-03-29T14:37:43Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1475222017-12-18T13:49:21Zcom_10261_31com_10261_3col_10261_284
00925njm 22002777a 4500
dc
Palacios, Elias
author
Bartolomé, Juan
author
Wang, GaoFeng
author
Burriel, Ramón
author
Skokov, Konstantin P.
author
Taskaev, Sergey
author
Khovaylo, Vladimir
author
2015
Direct 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.
Entropy 17(3): 1236-1252 (2015)
http://hdl.handle.net/10261/147522
10.3390/e17031236
http://dx.doi.org/10.13039/501100003339
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100003443
Heusler alloys
Magnetocaloric effect
Thermal hysteresis
Heat capacity
Analysis of the magnetocaloric effect in Heusler alloys: study of Ni50CoMn36Sn13 by calorimetric techniques