Effect of Fe substitution by Co on off-stoichiometric Ni-Fe-Co-Mn-Sn Heusler alloy ribbons

被引：11
作者：
Mishra, S. S. [1 ]
Mukhopadhyay, Semanti [2 ]
Yadav, T. P. [1 ,3 ]
Yadav, R. M. [4 ]
Radhakrishnan, Sruthi [3 ]
Vajtai, R. [3 ]
Ajayan, P. M. [3 ]
Mukhopadhyay, N. K. [5 ]
Singh, H. K. [6 ]
Srivastava, O. N. [1 ]
机构：
[1] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India
[2] Indian Inst Technol, Dept Mat Sci & Engn, Kanpur 208016, Uttar Pradesh, India
[3] Rice Univ, Dept Mat Sci & Nano Engn, Houston, TX 77005 USA
[4] Vikramajeet Singh Sanatan Dharma Coll, Dept Phys, Kanpur 208002, Uttar Pradesh, India
[5] Indian Inst Technol BHU, Dept Met Engn, Varanasi 221005, Uttar Pradesh, India
[6] CSIR, Natl Phys Lab, Dr K S Krishnan Rd, New Delhi 110012, India
来源：
MATERIALS RESEARCH EXPRESS | 2017年 / 4卷 / 08期
关键词：
Heusler alloy; melt-spun ribbon; NiFeCoMnSn; magnetic shape memory alloy; FIELD-INDUCED STRAIN; SHAPE-MEMORY ALLOYS; MAGNETIC-FIELD; MARTENSITIC-TRANSFORMATION; PHASE; GA; MAGNETOSTRICTION; TRANSITION; BEHAVIOR;
D O I：
10.1088/2053-1591/aa81a2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have synthesized Ni45Fe5-XCoXMn40Sn10 Heusler alloy with different Co doping and studied the effect on the structural and magnetic properties of Ni45Fe5-XCoXMn40Sn10 (at. X = 0,2.5,5) ribbons. X-ray diffraction, scanning and transmission electron microscopic characterization reveal the structural/microstructural features in melt-spun ribbons of different compositions. A significant transformation in the crystal structure has been observed in Fe substituted ribbons. The crystal structure changes from cubic L2(1) phase to bi-phasic 4O + L2(1) and 10M + L2(1) modulated phases for the partial and complete substitution of Fe by Co specimens respectively. Williamson-Hall analysis of x-ray diffraction data was used to compute the crystallite size and residual elastic strain. Magnetic properties and magnetic field-induced structural transformation of melt-spun alloy ribbons over a large temperature range of 10 K <= T <= 500 K were examined. Our results revealed that Fe substitution by Co causes a change in the magnetic behavior which could be ascribed to the increase in the lattice strain as well as a magnetic strain due to high antiferromagnetic fraction.
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页数：11
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