Magnetic phase transition and magnetocaloric effect in Mn1-xZnxCoGe alloys

doi:10.1088/1674-1056/23/9/097502

Abstract The magnetic phase transition and magnetocaloric effect are studied in a series of Mn_1-xZn_xCoGe (x=0.01, 0.02, 0.04, and 0.08) alloys. By introducing a small quantity of Zn element, the structural transformation temperature of the MnCoGe alloy is greatly reduced and a first-order magnetostructural transition is observed. Further increasing the Zn concentration results in a second-order ferromagnetic transition. Large room-temperature magnetocaloric effects with small magnetic hysteresis are obtained in alloys with x=0.01 and 0.02, which suggests their potential application in magnetic refrigeration.

Keywords: magnetocaloric effect magnetostructural transition

Received: 02 April 2014
Revised: 09 May 2014
Published: 15 September 2014

PACS:	75.30.Sg	(Magnetocaloric effect, magnetic cooling)
	81.30.Kf	(Martensitic transformations)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51371095).

Corresponding Authors: Wang Dun-Hui
E-mail: wangdh@nju.edu.cn

Cite this article:

Shen Cheng-Juan, Liu Qiang, Gong Yuan-Yuan, Wang Dun-Hui, Du You-Wei Magnetic phase transition and magnetocaloric effect in Mn_1-xZn_xCoGe alloys 2014 Chin. Phys. B 23 097502

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