Investigation of the inverse magnetocaloric effect with the fraction method

• Published in: Journal of physics. Condensed matter Vol. 35; no. 34; pp. 345801 - 345808
• Main Authors: Yuce, S, Kavak, E, Yildirim, O, Bruno, N M, Emre, B
• Format: Journal Article
• Language: English
• Published: England IOP Publishing 30.08.2023
• Subjects: Heusler alloys; inverse magnetocaloric effect; magnetic shape memory alloys; magnetocaloric effect; martensitic transformation; Heusler alloys; martensitic transformation; inverse magnetocaloric effect; magnetocaloric effect; magnetic shape memory alloys
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/1361-648X/acd3ce

In this study, we examine Ni Nb Mn In (nom. at.%) magnetic shape memory alloy (MSMA) to illustrate the inverse magnetocaloric effect (MCE) using the fraction method. The magnetic entropy change,ΔSmag, was calculated with both, the fraction method and the thermomagnetic Maxwell relation. Our results demonstrate that there exists a large magnetization difference between field-cooling and field-heating histories in Ni Nb Mn In (nom. at.%) MSMA, which can be attributed to the pinning of lattice entropy and magnetic entropy, as it is well-known that the temperature and applied magnetic fields have an opposing effect on the total entropy change. In addition, we describe the inverse MCE and the contradictory roles on the total entropy change between the two stimuli via the fraction method.