Study of the electronic properties of some ytterbium filled skutterudites by magnetic susceptibility and x-ray absorption and tin-119 Mössbauer spectroscopy
Study of the electronic properties of some ytterbium filled skutterudites by magnetic susceptibility and x-ray absorption and tin-119 Mössbauer spectroscopy
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DOI：
10.1063/1.1623609
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发表时间：
2003-10
影响因子：
3.2
通讯作者：
F. Grandjean;G. Long;B. Mahieu,;J. Yang;G. Meisner;D. Morelli
中科院分区：
文献类型：
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作者：
F. Grandjean;G. Long;B. Mahieu,;J. Yang;G. Meisner;D. Morelli
用磁化率、YbCo4Sb12-XSNX和TiN-119型穆斯堡尔谱测量了YbyCo4Sb12-XSNX填充或部分填充的Skutterudite化合物中YbCo4Sb12-XSNX的电子结构。由磁化率和Yb的L-III边X射线吸收测量得到的Yb价态非常一致，清楚地揭示了从x=0的中价Yb到x=0.8时的近二价Yb的演化。这种演变与单位晶胞体积的增加相平行，从而随着锡含量的增加而增加了可用Yb位体积。TiN-119穆斯堡尔谱超精细参数表明，TiN取代了方铅矿结构的亚晶格上的Sb。此外，锡的电子构型在结构上与锑的电子构型非常相似，并且对Yb含量不敏感，y。(C)2003美国物理研究所。
Magnetic susceptibility, ytterbium L-III-edge x-ray absorption and tin-119 Mossbauer spectral measurements have been carried out to probe the electronic structure of ytterbium and tin in the filled or partially filled skutterudite compounds, YbyCo4Sb12-xSnx, over a range of x and y values. The ytterbium valence obtained from the magnetic susceptibility and ytterbium L-III-edge x-ray absorption measurements is in excellent agreement and clearly reveals an evolution from intermediate valence ytterbium for x=0 to nearly divalent ytterbium for x=0.8. This evolution parallels an increase in the unit cell volume and hence in the ytterbium site volume available as the tin content increases. The tin-119 Mossbauer spectral hyperfine parameters indicate, without question, that tin substitutes on the antimony sublattice of the skutterudite structure. Further, the tin electronic configuration is both very similar to that of the antimony in the structure and insensitive to the ytterbium content, y. (C) 2003 American Institute of Physics.