Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 540, Issue -, Pages 236-240Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2012.05.072
Keywords
Magnetocaloric effect; Martensitic transition; Synchrotron measurements
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Funding
- TUBITAK [109T743]
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The structural, magnetic and magnetocaloric properties of CoMnGe0.95Ga0.05 have been investigated by using electron microscopy, calorimetric, synchrotron and magnetic measurements. The substitution of Ga for Ge leads to decreasing on the martensitic transition temperature from 650 K to 315 K. CoMnGe0.95Ga0.05 has hexagonal structure (space group P6(3)/mmc) above the martensitic transition temperature and orthorhombic structure (space group Pnma) below this temperature. The magnetic field dependence of magnetization measurements are performed in the heating and cooling processes around the martensitic transition temperature to determine magnetocaloric effect. It is observed that the magnetic entropy change associated with the martensitic transition temperature can be as high as -5.2 J kg(-1) K-1 in field of 1 T. (C) 2012 Elsevier B.V. All rights reserved.
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