The effect of the substitution of Cu for Mn on magnetic and magnetocaloric properties of Ni50Mn34In16

被引：29
作者：
Kaya, M. [1 ]
Yildirim, S. [2 ]
Yuzuak, E. [1 ,3 ]
Dincer, I. [1 ]
Ellialtioglu, R. [4 ]
Elerman, Y. [1 ]
机构：
[1] Ankara Univ, Fac Engn, Dept Engn Phys, TR-06100 Ankara, Turkey
[2] Hacettepe Univ, Nanotechnol & Nanomed Div, TR-06800 Ankara, Turkey
[3] Recep Tayyip Erdogan Univ, Fac Engn, Dept Nanotechnol Engn, TR-53100 Rize, Turkey
[4] Hacettepe Univ, Fac Engn, Dept Engn Phys, TR-06800 Ankara, Turkey
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2014年 / 368卷
关键词：
Martensitic transition; Magnetocaloric effect; Magnetic measurement; SHAPE-MEMORY ALLOYS; MARTENSITIC-TRANSFORMATION; HEUSLER ALLOY; SN ALLOYS; NI; PHASE; MAGNETORESISTANCE; TRANSITIONS;
D O I：
10.1016/j.jmmm.2014.05.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of Cu substitution for Mn on magnetic and magnetocaloric properties has been investigated in Ni50Mn34-xCuxIn16 (x=1.3 and 1.6) Hensler alloys by using calorimetric and magnetic measurements. The temperature dependent magnetization measurements and calorimetric studies indicate that martensitic transition temperatures shift to higher temperatures with increasing valence electron concentrations, ela. The isothermal magnetization curves around the martensitic transition temperatures show a typical metamagnetic behavior. Associated with that, large positive values of magnetic entropy changes around structural transition region were determined by using the Maxwell and Clausius-Clapeyron relations. The maximum magnetic entropy change values were found to be 25.2 and 5.7 J kg(-1) K-1 for Ni50Mn34-xCuxIn16 (x=1.3 and 1.6) alloys by Maxwell relation in a magnetic field change of 2 T. In order to understand the limit can be reached for, the magnetic entropy change values recalculated by Clausius-Clapeyron relation. Obtained maximum entropy change values are 22.8 and 16.3 J kg(-1) K-1 for Ni50Mn34-xCuxIn16 (x=1.3 and 1.6) alloys by Clausius-Clapeyron relation. (C) 2014 Elsevier B.V. All rights reserved,
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页码：191 / 197
页数：7
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