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

页码：2817 / 2820

页数：4

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