Effects of band filling on magnetic structures:: The case of RNi2Ge2

被引：17
|
作者：
Islam, Z
Detlefs, C
Song, C
Goldman, AI
Antropov, V
Harmon, BN
Bud'ko, SL
Wiener, T
Canfield, PC
Wermeille, D
Finkelstein, KD
机构：
[1] Iowa State Univ, Ames Lab, Ames, IA 50011 USA
[2] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
[3] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA
[4] Cornell Univ, Cornell High Energy Synchrotron Source, Ithaca, NY 14853 USA
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 14期
关键词：
D O I：
10.1103/PhysRevLett.83.2817
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We establish that strong Fermi surface nesting drives the Neel transition in the RNi2Ge2 compounds. Generalized susceptibility, chi(0)(q), calculations found nesting to be responsible for both incommensurate wave vector, (0 0 0.793), in GdNi2Ge2, and the commensurate structure, (0 0 1), in EuNi2Ge2, as revealed by x-ray resonant exchange scattering. A continuous transition from incommensurate to commensurate magnetic structures via band filling is predicted. The surprisingly higher T-N in EuNi2Ge2 than that in GdNi2Ge2 is also explained.
引用
收藏
页码：2817 / 2820
页数：4
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