Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, CA 92093, USA.
J Phys Condens Matter. 2010 Apr 28;22(16):164204. doi: 10.1088/0953-8984/22/16/164204. Epub 2010 Mar 30.
Substitution of Re for Ru in the heavy fermion compound URu(2)Si(2) suppresses the hidden order transition and gives rise to ferromagnetism at higher concentrations. The hidden order transition of URu(2 - x)Re(x)Si(2), tracked via specific heat and electrical resistivity measurements, decreases in temperature and broadens, and is no longer observed for x > 0.1. A critical scaling analysis of the bulk magnetization indicates that the ferromagnetic ordering temperature and ordered moment are suppressed continuously towards zero at a critical concentration of x ≈ 0.15, and this is accompanied by the additional suppression of the critical exponents γ and δ - 1 towards zero. This unusual trend appears to reflect the underlying interplay between Kondo and ferromagnetic interactions, and perhaps the proximity of the hidden order phase.
在重费米子化合物 URu(2)Si(2)中用 Ru 替代部分 Ru 可以抑制隐藏序相变并在较高浓度下产生铁磁性。URu(2-x)Re(x)Si(2)的隐藏序相变通过比热和电阻率测量来跟踪，其相变温度降低且变宽，当 x > 0.1 时，不再观察到该相变。对体磁化率的临界标度分析表明，在临界浓度 x ≈ 0.15 处，铁磁有序温度和有序矩连续向零抑制，并且临界指数 γ 和 δ - 1 也连续向零抑制。这种异常趋势似乎反映了 Kondo 和铁磁相互作用之间的相互作用，也许是隐藏序相的临近。
