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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název On the electronic origin of the inverse magnetocaloric effect in Ni-Co-Mn-In Heusler alloys Tvůrce(i) 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)Zdroj.dok. Journal of Physics D-Applied Physics. - : Institute of Physics Publishing - ISSN 0022-3727
Roč. 43, č. 5 (2010), 055004/1-055004/7Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova inverse magnetocaloric effect ; magnetically induced martensitic transformation ; magnetic and transport properties ; Ni-Mn-In-Co Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000274411200004 DOI 10.1088/0022-3727/43/5/055004 Anotace 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. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2011
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