Phase Transformations and Magnetocaloric Effect in Ni-Mn-(Co)-In Heusler Alloys

In this work we experimentally study the magnetic properties and magnetocaloric effect (MCE) of the Ni1.73Mn1.80In0.47 and Ni1.72Co0.28Mn1.51In0.49 Heusler alloys. The direct measurements of the adiabatic temperature change ΔTad in magnetic field change to 2 T have shown that replacement of the Ni a...

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Bibliographic Details
Published in:Physics procedia 2015, Vol.75, p.1259-1264
Main Authors: Fayzullin, Rafael, Buchelnikov, Vasiliy, Mashirov, Alexey, Zhukov, Maxim
Format: Article
Language:English
Subjects:
Heusler alloys
Magnetocaloric effect
Ni-Co-Mn-In alloys
phase transitions
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Summary:In this work we experimentally study the magnetic properties and magnetocaloric effect (MCE) of the Ni1.73Mn1.80In0.47 and Ni1.72Co0.28Mn1.51In0.49 Heusler alloys. The direct measurements of the adiabatic temperature change ΔTad in magnetic field change to 2 T have shown that replacement of the Ni atoms with the Co atoms increases the absolute value of inverse magnetocaloric effect. Replacement of the Ni atoms on the Co atoms also increases the temperature of magnetostructural transition and Curie temperature. The maximum adiabatic temperature change of -2.4K was achieved in Ni1.72Co0.28Mn1.51In0.49 alloy at 311K (near the martensitic transformation temperature) in a field of 2 T. The magnetostructural transformation from the antiferromagnetic-like martensite to the ferromagnetic austenite phase of both compositions was found. The latent heat linked with the first-order transformation was determined by differential scanning calorimetry (DSC).
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2015.12.139