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. These alloys show anomalous thermomagnetic irreversibility at low temperature due to kinetic arrest of the first order AFM-FM transition. All the three studied compositions show re-entrant transition in zero field cooled warming curve and anomalous non-monotonic variation of upper critical field in isothermal magnetization. The region in H-T space, where these features of kinetic arrest manifest themselves, increases with increasing Ta concentration.
@article{arxiv.1209.3177,
title = {Concentration dependence in kinetic arrest of first order magnetic transition in Ta doped $HfFe_2$},
author = {R. Rawat and P. Chaddah and Pallab Bag and P. D. Babu and V. Siruguri},
journal= {arXiv preprint arXiv:1209.3177},
year = {2013}
}
Comments
Data is relevant to coupling of latent heat to thermal conduction criterion for Glass formation (arXiv:1004.3116)