UGC-DAE Consortium for Scientific Research, University Campus, Indore, India.
J Phys Condens Matter. 2013 Feb 13;25(6):066011. doi: 10.1088/0953-8984/25/6/066011. Epub 2013 Jan 11.
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.
我们研究了赝二元合金 Hf(1-x)Ta(x)Fe(2)的磁性，其零场铁磁 (FM) 到反铁磁 (AFM) 转变温度可调节至接近 T = 0 K。我们的研究表明，这种成分位于 x = 0.230 左右。对 x = 0.225、0.230 和 0.235 的详细磁化研究表明，由于一级 AFM-FM 转变的动力学停滞，低温下出现热磁不可逆性。所研究的三种成分在零场冷却升温曲线上均表现出再入转变和上临界场的非单调变化。在 H-T 空间中，这些动力学停滞特征表现出来的区域随 Ta 浓度的增加而增加。
