Tunable magnetostructural phase transition and magnetocaloric effect in Mn1−xNi1−xCo2xSi1−xGex system

Magnetostructural transition and the associated magnetocaloric effect were investigated for Mn1−xNi1−xCo2xSi1−xGex system. Co and Ge co-substitution drastically reduces the structural transition temperature from 1200 K to below room temperature. The magnetostructural transition occurring between a f...

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Bibliographic Details
Published in:Journal of alloys and compounds 2017-03, Vol.698, p.7-12
Main Authors: Zhao, J.Q., Zhang, C.L., Nie, Y.G., Shi, H.F., Ye, E.J., Han, Z.D., Wang, D.H.
Format: Article
Language:English
Subjects:
Chemical elements
Cobalt
Curie temperature
Entropy
Ferromagnetism
Germanium
Magnetocaloric effect
Magnetostructural transition
Manganese
Phase transitions
Silicon
Transition temperature
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Summary:Magnetostructural transition and the associated magnetocaloric effect were investigated for Mn1−xNi1−xCo2xSi1−xGex system. Co and Ge co-substitution drastically reduces the structural transition temperature from 1200 K to below room temperature. The magnetostructural transition occurring between a ferromagnetic and a paramagnetic state with a sharp jump in magnetization was realized, which is tunable in a broad Curie-temperature window spanning room temperature by altering the composition. Relatively large magnetic entropy changes and broad working temperature ranges were observed. These results suggest that the Mn1−xNi1−xCo2xSi1−xGex system can be an attractive platform for the tunable magnetostructural transition and the magnetocaloric effect. •Realization of FM/PM-type magnetostructural transition by three-site co-substitution.•Enhanced saturation magnetization and ΔM due to substitution of Co for Ni.•Large magnetic entropy changes and broad working temperature span.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2016.12.156