Evolution of crystalline electric field effects, superconductivity, and heavy-fermion behavior in the specific heat of Pr(Os1-xRux)4Sb12 -: art. no. 064508
Evolution of crystalline electric field effects, superconductivity, and heavy-fermion behavior in the specific heat of Pr(Os1-xRux)4Sb12 -: art. no. 064508
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DOI：
10.1103/physrevb.71.064508
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发表时间：
2005-02-01
影响因子：
3.7
通讯作者：
Maple, MB
中科院分区：
文献类型：
--
作者：
Frederick, NA;Sayles, TA;Maple, MB
测量了方钴矿系列Pr（Os_（1-x）Rux）（4）Sb-12超导填充单晶的比热C（T），温度低至0.6K。晶体电场适合在正常状态下产生的参数与以前的测量结果一致。对于Ru浓度x的所有值都观察到体超导电性，其转变温度与之前的实验一致，证实了x=0.6时T-c的最小值。低于T-c的C（T）数据似乎与x=0（PrOs 4Sb 12）的幂律行为和0.05的指数行为更一致
Specific heat C(T) measurements were made on single crystals of the superconducting filled skutterudite series Pr(Os1-xRux)(4)Sb-12 down to 0.6 K. Crystalline electric field fits in the normal state produced parameters which were in agreement with previous measurements. Bulk superconductivity was observed for all values of the Ru concentration x with transition temperatures consistent with previous experiments, confirming a minimum in T-c at x=0.6. The C(T) data below T-c appear to be more consistent with power-law behavior for x=0 (PrOs4Sb12), and with exponential behavior for 0.05