Strong valence fluctuation effects in SmTr2Al20 (Tr=Ti,V,Cr)
Strong valence fluctuation effects in SmTr2Al20 (Tr=Ti,V,Cr)
复制标题
SmTr2Al20 (Tr=Ti,V,Cr) 中的强价态波动效应
DOI：
10.1103/physrevb.84.201106
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
S.Nakatsuji
中科院分区：
文献类型：
--
作者：
A.Sakai;S.Nakatsuji
我们提出了一个单晶研究的低温磁性和输运SmAl（，V，和Cr）。强的价涨落表现为近藤效应，包括大的索末菲系数、弱的磁化率温度依赖性和电阻率依赖性。所有的体系在K（Ti）、2.9K（V）和1.8K（Cr）处都是反铁磁有序的.磁化率，比热，和电阻率的系统变化表明，更强的杂化SmVAl和SmCrAl比SmTiAl suppressesand诱导的价波动，而且，场不敏感的重费米子状态。
We present a single-crystal study of low-temperature magnetism and transport in SmAl(, V, and Cr). Strong valence fluctuation is manifested as Kondo effects, including a large Sommerfeld coefficient, a weak temperature dependence of magnetic susceptibility, and adependent resistivity. All the systems order antiferromagnetically atK (Ti), 2.9 K (V), and 1.8 K (Cr). A systematic change in the susceptibility, specific heat, and resistivity indicates that stronger-hybridization in SmVAland SmCrAlthan in SmTiAlsuppressesand induces the valence fluctuations and, moreover, field-insensitive heavy fermion states.