Structural, Thermal and Magnetic Properties of Ga Excess Ni-Mn-Ga

被引：7
|
作者：
Singh, Sanjay [1 ]
Bhardwaj, S. [1 ]
Panda, A. K. [2 ]
Ahire, V. K. [1 ]
Mitra, A. [2 ]
Awasthi, A. M. [1 ]
Barman, S. R. [1 ]
机构：
[1] UGC DAE Consortium Sci Res, Khandwa Rd, Indore 452001, Madhya Pradesh, India
[2] Natl Met Lab, Jamshedpur, Bihar 831007, India
来源：
FERROMAGNETIC SHAPE MEMORY ALLOYS II | 2010年 / 635卷
关键词：
Ferromagnetic shape memory alloys; x-ray diffraction; martensitic transition; SHAPE-MEMORY ALLOYS; FIELD-INDUCED STRAIN; MARTENSITIC-TRANSFORMATION; CRYSTAL-STRUCTURE; POWDER; PHASES;
D O I：
10.4028/www.scientific.net/MSF.635.43
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The martensitic transition and the ferro- to paramagnetic transition have been studied in a series of Ga excess Ni-Mn-Ga specimens [Ni2-xMnGa1+x (0.4 <= x <= 0.9)] by differential scanning calorimetry and magnetization measurements. The martensitic transition exhibits a hysteresis whose width is similar to Ni2MnGa, indicating that the transition is thermoelastic. The latent heat of transformation is comparable with other Ni-Mn-Ga alloys. A substantial increase in the martensitic transition temperature is observed due to Ga doping. Interestingly, the x-ray diffraction pattern of all the compositions studied show a modulated martensitic structure in the martensitic phase.
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页码：43 / +
页数：3
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