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Metals 2013, 3(1), 69-76; doi:10.3390/met3010069
Article

Exchange Bias and Inverse Magnetocaloric Effect in Co and Mn Co-Doped Ni2MnGa Shape Memory Alloy

 and *
Received: 13 December 2012; in revised form: 8 January 2013 / Accepted: 17 January 2013 / Published: 25 January 2013
(This article belongs to the Special Issue Shape Memory Alloys)
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Abstract: Exchange bias effect observed in the Ni1.68Co0.32Mn1.20Ga0.80 alloy confirms the coexistence of antiferromagnetic and ferromagnetic phases in the martensite phase. A large inverse magnetocaloric effect has been observed within the martensitic transformation temperature range, which is originated from modified magnetic order through magnetic-field-induced phase transformation from partially antiferromagnetic martensite to ferromagnetic austenite. The magnetic entropy change is 16.2 J kg−1 K−1 at 232 K under ΔH = 60 kOe, with the net refrigerant capacity of 68 J kg−1. These properties indicate Co and Mn co-doped Ni2MnGa alloy is a multifunctional material potentially suitable for magnetic refrigeration and spintronics applications.
Keywords: shape memory alloy; exchange bias; inverse magnetocaloric effect; Ni-Mn-Ga; martensitic transformation shape memory alloy; exchange bias; inverse magnetocaloric effect; Ni-Mn-Ga; martensitic transformation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Wang, B.; Liu, Y. Exchange Bias and Inverse Magnetocaloric Effect in Co and Mn Co-Doped Ni2MnGa Shape Memory Alloy. Metals 2013, 3, 69-76.

AMA Style

Wang B, Liu Y. Exchange Bias and Inverse Magnetocaloric Effect in Co and Mn Co-Doped Ni2MnGa Shape Memory Alloy. Metals. 2013; 3(1):69-76.

Chicago/Turabian Style

Wang, Baomin; Liu, Yong. 2013. "Exchange Bias and Inverse Magnetocaloric Effect in Co and Mn Co-Doped Ni2MnGa Shape Memory Alloy." Metals 3, no. 1: 69-76.


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