title: Concentration dependence in kinetic arrest of the first-order magnetic transition in Ta doped HfFe2.
abstract: Magnetic behavior of the pseudo-binary alloy Hf(1-x)Ta(x)Fe(2) 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.
authors: UGC-DAE Consortium for Scientific Research, University Campus, Indore, India. rrawat@csr.res.in
authors: R
authors: R
authors: Rawat
authors: P
authors: P
authors: Chaddah
authors: Pallab
authors: P
authors: Bag
authors: P D
authors: PD
authors: Babu
authors: V
authors: V
authors: Siruguri
mesh_terms: D000497:Alloys / Q000737:chemistry*; D003198:Computer Simulation; D006195:Hafnium / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D008280:Magnetics; D059346:Magnets / Q000737:chemistry*; D008956:Models, Chemical; D013635:Tantalum / Q000737:chemistry*; D013696:Temperature
chemical_list: D000497:Alloys; D013635:Tantalum; D007501:Iron; D006195:Hafnium