Concentration dependence in kinetic arrest of first order magnetic transition in Ta doped $HfF{e}_2$

Abstract

Magnetic behavior of the pseudo-binary alloy $H{f}_{1-x}T{a}_{x}F{e}_2$ 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.

Data is relevant to coupling of latent heat to thermal conduction criterion for Glass formation (arXiv:1004.3116)

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