Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 387, Issue -, Pages 107-110Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2015.03.095
Keywords
MnCoGe alloys; Magnetocaloric effect; First order magnetic transition; Magneto-structural coupling
Funding
- National Basic Research Program of China (973 Program) [2012CB619405]
- National Natural Science Foundation of China [51001015]
- Fundamental Research Funds for the Central Universities [06111020]
- fundamental research fund by State Key Laboratory for Advanced Metals and Materials [2014Z-01]
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The effects of Ga-doping on the phase transition behaviors and magnetocaloric properties of MnCoGe alloys are systematically investigated through calorimetry and magnetic measurements. The magneto-structural coupling between the structural and magnetic transitions is achieved in the MnCoGe1-xGax alloys by decreasing the structural transition temperature via Ga substitution. An 80 K Curie-temperature window is established between Curie temperatures of austenite and martensite phases. Within the window, a magnetic entropy change of 34 J kg(-1) K-1 can be obtained near room temperature under the application of a 5 T magnetic held. (C) 2015 Elsevier B.V. All rights reserved.
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