Magnetic phase transition and magnetocaloric effect in Mn1-xZnxCoGe alloys

The magnetic phase transition and magnetocaloric effect are studied in a series of Mn1-xZnxCoGe （x = 0.0l, 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...

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Published in中国物理B：英文版 no. 9; pp. 428 - 431
Main Author 沈程娟 刘强 龚元元 王敦辉 都有为
Format Journal Article
LanguageEnglish
Published 01.09.2014
Subjects
n含量
合金
磁制冷
磁热效应
磁相变
转变温度
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Summary:The magnetic phase transition and magnetocaloric effect are studied in a series of Mn1-xZnxCoGe （x = 0.0l, 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.
Bibliography:magnetocaloric effect, magnetostructural transition
The magnetic phase transition and magnetocaloric effect are studied in a series of Mn1-xZnxCoGe （x = 0.0l, 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.
Shen Cheng-Juan, Liu Qiang, Gong Yuan-Yuan, Wang Dun-Hui, Du You-Wei（ National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, China）
11-5639/O4
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/23/9/097502