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

Palacios, Elias (Universidad de Zaragoza) ; Bartolome, Juan (Universidad de Zaragoza) ; Wang, Gaofeng ; Burriel, Ramon (Universidad de Zaragoza) ; Skokov, Konstantin ; Taskaev, Sergey ; Khovaylo, Vladimir

Resumen: Direct determinations of the isothermal entropy increment, -¿ST , 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.

Idioma: Inglés

DOI: 10.3390/e17031236

Año: 2015

Publicado en: ENTROPY 17, 3 (2015), 1236-1252
ISSN: 1099-4300

Factor impacto JCR: 1.743 (2015)

Categ. JCR: PHYSICS, MULTIDISCIPLINARY rank: 25 / 79 = 0.316 (2015) - Q2 - T1

Factor impacto SCIMAGO: 0.551 - Physics and Astronomy (miscellaneous) (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E100
Financiación: info:eu-repo/grantAgreement/ES/DGA/IMANA-E34
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2011-23791
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-44063-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2014-53921-R

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)