Metamagnetic transitions and magnetocaloric effect in epitaxial Ni–Co–Mn–In films

0353130 - FZÚ 2011 RIV US eng J - Článek v odborném periodiku
Niemann, R. - Heczko, Oleg - Schultz, L. - Fähler, S.
Metamagnetic transitions and magnetocaloric effect in epitaxial Ni–Co–Mn–In films.
Applied Physics Letters. Roč. 97, č. 22 (2010), 222507/1-222507/3. ISSN 0003-6951. E-ISSN 1077-3118
Grant ostatní: AVČR(CZ) M100100913; DFG - SPP1239(DE) FA 453/7
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: Ni–Co–Mn–In films * martensitic transformation * magnetically induced transformation
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.820, rok: 2010

Due to their large strains and multifunctionality, magnetic shape memory alloys are of particular interest for microsystems. Here epitaxially grown metamagnetic Ni–Co–Mn–In films on MgO (001) are analyzed which exhibit a magnetically induced austenite transition. This opens the way to use Ni–Co–Mn–In films in microactuators combining high stroke with high forces. Additionally these films exhibit an inverse magnetocaloric effect with an entropy change of 8.8 J kg−1 K−1 in 9 T at 353 K. The high surface-to-volume fraction of films promises a fast heat exchange, which is beneficial for efficient magnetic cooling.
Trvalý link: http://hdl.handle.net/11104/0192457