Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 690, Issue -, Pages 663-668Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.08.126
Keywords
Magnetostructural transformation; Magnetocaloric effect; Negligible magnetic hysteresis loss; Loop process; Mni(1-x)Cr(x)CoGe ribbons
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Funding
- National Natural Science Foundation of China [51261022, 51561023]
- Science and Technology Plan Projects of Department of Education of Jiangxi Province [GJJ150724]
- Jiangxi Provincial Graduate Student Innovation Special Funds Project [YC2015-S310]
- Graduate Student Innovation Special Funds Project of Nanchang Hangkong University [YC2015007]
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The Mn1-xCrxCoGe (x = 0.01, 0.015, 0.02, 0.03) alloy ribbons are prepared. The microstructure, structure, magnetic and magnetocaloric properties were studied in these ribbons. The substitution of Cr for Mn effectively reduces the structural transformation temperature of MnCoGe alloy. In annealed Mn0.98Cr0.02CoGe ribbons, a coupled magnetostructural transformation from the ferromagnetic TiNiSi-type to paramagnetic Ni2In-type state with the increasing temperature is observed. As a result, large magnetdcaloric effect near room temperature and simultaneously almost zero magnetic hysteresis losses presented in these ribbons would be favorable to room-temperature magnetic refrigeration. In measuring the isothermal magnetization curves, both the loop and standard methods are adopted to compare and make sure the reliability of our results. (C) 2016 Elsevier B.V. All rights reserved.
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