Abstract
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 80K Curie-temperature window is established between Curie temperatures of austenite and martensite phases. Within the window, a magnetic entropy change of 34Jkg−1K−1 can be obtained near room temperature under the application of a 5T magnetic field.
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