Mechanism of Field Induced Fermi Liquid State in Yb-Based Heavy-Fermion Compound : X-ray Absorption Spectroscopy and Nuclear Magnetic Resonance Studies of YbCo_2 Zn_<20>
Mechanism of Field Induced Fermi Liquid State in Yb-Based Heavy-Fermion Compound : X-ray Absorption Spectroscopy and Nuclear Magnetic Resonance Studies of YbCo_2 Zn_<20>
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镱基重费米子化合物中场诱导费米液态的机理：YbCo_2 Zn_<20>的X射线吸收光谱和核磁共振研究
DOI：
10.1143/jpsj.81.033706
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
他8名
中科院分区：
文献类型：
--
作者：
T. Mito;T. Koyama;K. Nakagawara;T. Ishida;K. Ueda;T. Kohara;他8名
利用X射线吸收光谱、~（59）Co核磁共振和磁化强度测量研究了重费米子化合物YbCo_2 Zn_（20）的Yb价态和磁性随磁场的变化关系。我们的研究结果清楚地表明，场致费米液体的行为的机制不涉及在Yb的电子配置的变化，是磁起源。几个Yb基HF材料的磁化率的典型例子，其中可以看到系统的变化之间的本地化和离域的4f电子的图片。
We have investigated the field dependences of Yb valence as well as of the magnetic properties of the heavy-fermion (HF) compound YbCo2Zn20by X-ray absorption spectroscopy,59Co nuclear magnetic resonance, and magnetization measurements. Our results clearly show that the mechanism of field-induced Fermi-liquid-like behavior does not involve variation in the Yb electronic configuration, and is of magnetic origin. Typical examples of the susceptibility for several Yb-based HF materials are presented, in which one can see systematic changes between localized and delocalized pictures of 4felectrons.