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On the electronic origin of the inverse magnetocaloric effect in Ni-Co-Mn-In Heusler alloys
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SYSNO ASEP 0348723 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title On the electronic origin of the inverse magnetocaloric effect in Ni-Co-Mn-In Heusler alloys Author(s) Vasiliev, A. N. (RU)
Heczko, Oleg (FZU-D) RID, ORCID
Volkova, O.S. (RU)
Vasilchikova, T.N. (RU)
Voloshok, T.N. (RU)
Klimov, K.V. (RU)
Ito, W. (JP)
Kainuma, R. (JP)
Ishida, K. (JP)
Oikawa, K. (JP)
Fähler, S. (DE)Source Title Journal of Physics D-Applied Physics. - : Institute of Physics Publishing - ISSN 0022-3727
Roč. 43, č. 5 (2010), 055004/1-055004/7Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords inverse magnetocaloric effect ; magnetically induced martensitic transformation ; magnetic and transport properties ; Ni-Mn-In-Co Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000274411200004 DOI 10.1088/0022-3727/43/5/055004 Annotation In order to understand the electronic origin of the inverse magnetocaloric effect observed in a Ni-Co-Mn-In system we used a combination of indirect experimental probes as magnetization, resistivity and specific heat. The findings are compared with the band structure of isostructural Heusler alloys such as Ni-Mn-Ga. We suggest that the inverse magnetocaloric effect in Ni-Co-Mn-In originates from the high density of states close to Fermi energy. Within the austenite state this causes ferromagnetic band splitting. The structural change to the martensite allows an alternative way to reduce the high density of states at lower temperatures, which does not require band splitting and thus does not support ferromagnetic order. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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