Open AccessMartensitic transformation and magnetic features in Ni-Fe-Mn-In Heusler alloy
Author(s) -
张元磊,
李哲,
徐坤,
敬超
Publication year - 2015
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.64.066402
Subject(s) - materials science , diffusionless transformation , magnetic refrigeration , ferromagnetism , magnetoresistance , magnetic shape memory alloy , alloy , isothermal process , condensed matter physics , atmospheric temperature range , shape memory alloy , magnetization , martensite , magnetism , magnetic field , metallurgy , thermodynamics , microstructure , magnetic domain , physics , quantum mechanics
The Ni50-xFexMn37In13(x=1, 3, 5) polycrystalline samples are prepared by arc melting method. The martensitic transformations and crystal structures for Ni50-xFexMn37In13(x=1, 3, 5) samples are systematically analyzed by measuring the structure and magnetism. The results show that the three samples present different structures at room temperature. In the mean time, with the increase of the content of Fe, the martensitic transformation temperature rapidly decreases, while the ferromagnetism is gradually enhanced for these alloys. Furthermore, both the magnetoresistance and the magnetocaloric effect are also investigated in Fe3 and Fe5 alloys. For an applied magnetic field of 3 T, it is found that the magnetoresistance effects of two samples are about -46% and -15%, while their isothermal entropy changes are about 6 J·kg-1 and 9.5 J·kg-1·K-1 during reverse martensitic transformation, respectively. Accompanied with the disappearing of a very wide transforming range and a slight magnetic hysteresis loss, the net refrigerating capacity of Fe3 sample reaches 96 J·kg-1 in the process of reverse martensitic transformation.