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Magnetostructural transition and adiabatic temperature change in Mn–Co–Ge magnetic refrigerants

Liu, J. and Skokov, K. and Gutfleisch, O. (2012):
Magnetostructural transition and adiabatic temperature change in Mn–Co–Ge magnetic refrigerants.
In: Scripta Materialia, Elsevier Science Publishing, pp. 642-645, 66, (9), ISSN 13596462, [Online-Edition: http://dx.doi.org/10.1016/j.scriptamat.2012.01.048],
[Article]

Abstract

Crystal structure, structural and magnetic transitions were investigated in a series of MnCo0.95Gex (x = 0.95, 0.97, 1.0) alloys. A first-order magnetic transition was observed in MnCo0.95Ge0.97 with a large thermal and magnetic hysteresis, while the other two composition alloys undergo a second-order ferromagnetic transition. The adiabatic temperature change for MnCo0.95Ge0.97 strongly relies on the sample history (heating or cooling protocols) due to the competition of structural and magnetic transitions. The structural contribution works against the magnetic contribution to the total magnetocaloric effect.

Item Type: Article
Erschienen: 2012
Creators: Liu, J. and Skokov, K. and Gutfleisch, O.
Title: Magnetostructural transition and adiabatic temperature change in Mn–Co–Ge magnetic refrigerants
Language: English
Abstract:

Crystal structure, structural and magnetic transitions were investigated in a series of MnCo0.95Gex (x = 0.95, 0.97, 1.0) alloys. A first-order magnetic transition was observed in MnCo0.95Ge0.97 with a large thermal and magnetic hysteresis, while the other two composition alloys undergo a second-order ferromagnetic transition. The adiabatic temperature change for MnCo0.95Ge0.97 strongly relies on the sample history (heating or cooling protocols) due to the competition of structural and magnetic transitions. The structural contribution works against the magnetic contribution to the total magnetocaloric effect.

Journal or Publication Title: Scripta Materialia
Volume: 66
Number: 9
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Mn–Co–Ge, Magnetocaloric effect, Adiabatic temperature change, Magnetostructural transition
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Functional Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 19 Apr 2013 11:25
Official URL: http://dx.doi.org/10.1016/j.scriptamat.2012.01.048
Identification Number: doi:10.1016/j.scriptamat.2012.01.048
Funders: This work is financially supported by DFG (SPP 1239).
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