Influence of Al on structure, magnetic properties and magnetocaloric effect of Ni50Mn37−xAlxSn13 ribbons

Influence of Al-concentration on structure, magnetic properties and magnetocaloric effect of ( and 8) rapidly quenched ribbons was investigated. X-ray diffraction analysis shows that the ribbons exhibit single phase with a -cubic structure. Curie temperature, , of the alloy is slightly increased wit...

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Bibliographic Details
Published in:Advances in natural sciences. Nanoscience and nanotechnology 2018-06, Vol.9 (2)
Main Authors: Nguyen, Hai Yen, Nguyen, Thi Mai, Vu, Manh Quang, Pham, Thi Thanh, Tran, Dang Thanh, Nguyen, Huu Duc, Nguyen, Le Thi, Nguyen, Hoang Ha, Koledov, Victor, Kamantsev, Alexander, Mashirov, Alexey, Nguyen, Huy Dan
Format: Article
Language:English
Subjects:
Curie phase
magnetic entropy change
magnetocaloric effect
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Summary:Influence of Al-concentration on structure, magnetic properties and magnetocaloric effect of ( and 8) rapidly quenched ribbons was investigated. X-ray diffraction analysis shows that the ribbons exhibit single phase with a -cubic structure. Curie temperature, , of the alloy is slightly increased with increasing Al-concentration. Specially, the sample with has both the first- (FOPT) and second- (SOPT) order magnetic phase transitions. The reason for the FOPT in the alloy ribbons is due to existence of the structural transformation between martensitic and austenitic phases. The alloy owns both the positive and negative magnetocaloric effects with maximum magnetic entropy changes of and (in magnetic field change ), respectively. By using Arrott-Noakes and Kouvel-Fisher methods, the critical parameters of the alloy were determined to be close to those of the mean field theory of long-range ferromagnetic orders.
ISSN:2043-6262
2043-6254
DOI:10.1088/2043-6254/aac1d2