Concentration dependence in kinetic arrest of the first-order magnetic transition in Ta doped HfFe2

Magnetic behavior of the pseudo-binary alloy Hf1−xTaxFe2 has been studied, for which the zero-field ferromagnetic (FM) to antiferromagnetic (AFM) transition temperature is tuned near to T = 0 K. Our studies show that such composition lies around x = 0.230. Detailed magnetization studies on x = 0.225...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2013-02, Vol.25 (6), p.066011-066011
Main Authors: Rawat, R, Chaddah, P, Bag, Pallab, Babu, P D, Siruguri, V
Format: Article
Language:English
Subjects:
Alloys - chemistry
Computer Simulation
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Hafnium - chemistry
Iron - chemistry
Kinetics
Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Magnetics
Magnets - chemistry
Models, Chemical
Physics
Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
Tantalum - chemistry
Temperature
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Summary:Magnetic behavior of the pseudo-binary alloy Hf1−xTaxFe2 has been studied, for which the zero-field ferromagnetic (FM) to antiferromagnetic (AFM) transition temperature is tuned near to T = 0 K. Our studies show that such composition lies around x = 0.230. Detailed magnetization studies on x = 0.225, 0.230 and 0.235 show thermomagnetic irreversibility at low temperature due to kinetic arrest of the first-order AFM-FM transition. All three compositions studied show a reentrant transition in the zero-field-cooled warming curve and non-monotonic variation of the upper critical field. The region in H-T space where these features of kinetic arrest manifest themselves increases with increasing Ta concentration.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/25/6/066011