Journal
PHYSICAL REVIEW B
Volume 90, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.214409
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan [23340096]
- Grants-in-Aid for Scientific Research [23340096, 25610087] Funding Source: KAKEN
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To clarify the electronic, lattice, and magnetic contribution to the inverse magnetocaloric effect (IMCE) in the metamagnetic shape-memory alloy Ni45Co5Mn50-xInx, magnetization, magnetocaloric effect, and specific-heat measurements were carried out in a wide range of fields and temperatures. The IMCEs of Ni45Co5Mn36.7In13.3 were directly measured as adiabatic temperature changes in pulsed fields of up to 15 T. A maximum temperature decrease of -12.8 K was observed. The low-temperature specific heats in both the austenitic and the martensitic phases of Ni45Co5Mn36.5In13.5 were measured by using steady fields. Through analyses of the data, the entropy changes in charge (1.2 J/kg K), spin (-29 J/kg K), and lattice (51 J/kg K) sectors were individually evaluated. The result demonstrates the dominant role of the lattice sector in inverse MCEs in this material.
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