Valence and magnetic ordering in the Yb5SixGe4-x pseudobinary system

被引：11

作者：

Voyer, C. J. ^{[1
]}

Ryan, D. H.

Ahn, Kyunghan

Gschneidner, Karl A., Jr.

Pecharsky, V. K.

机构：

[1] McGill Univ, Ctr Phys Mat, Montreal, PQ H3A 2T8, Canada

[2] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[3] Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USA

[4] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.73.174422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Yb5SixGe4-x has been studied using Yb-170 Mossbauer spectroscopy. Ytterbium is present as both Yb2+ and Yb3+ in essentially equal amounts. The Yb3+ moments order below similar to 1.7 K for all x, and extrapolation of the hyperfine field to zero temperature yields Yb3+ moments of 2.1 +/- 0.2 mu(B). Despite the composition independent structure and valence balance in Yb5SixGe4-x, we find that the Yb3+ ordering is quite complex for x=1,2,3 and that there is a marked jump in T-N between x=3 and x=3.5.

引用

页数：6

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