Doniach diagram for ordered, disordered and underscreened Kondo lattices

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:320

Article; Proceedings Paper

Coqblin, B.¹  Iglesias, J. R.²  Perkins, N. B.^3,4  Magalhaes, S. G.⁵  Zimmer, F. M.⁵ 

[1] Univ Paris Sud, UMR 8502 CNRS, Phys Solides Lab, F-91405 Orsay, France

[2] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

[3] Tech Univ Carolo Wilhelmina Braunschweig, Inst Theoret Phys, D-38106 Braunschweig, Germany

[4] Bogoliubov Lab Theoret Phys, Dubna, Russia

[5] Univ Fed Santa Maria, Lab Mecan Estat & Teor Mat Condensada, BR-97105900 Santa Maria, RS, Brazil

关键词: Kondo lattice;    underscreened Kondo effect;    cerium compounds;    uranium compounds;   

DOI  :  10.1016/j.jmmm.2008.02.101

来源: Elsevier

【 摘 要 】

The Doniach's diagram has been originally proposed to describe the competition between the local Kondo effect and the inter-site RKKY interactions in cerium compounds. Here we discuss the extension of this diagram to different variations of Kondo lattice model. We consider (a) ordered cerium compounds where the competition between magnetic order and Kondo effect plays an important role, as in CeRh2Si2, (b) disordered cerium systems with competing spin glass phase, magnetic ordered phases and a Kondo phase, as in the heavy fermion cerium alloy CeCuxNi1-x and (c) uranium compounds where a coexistence between Kondo effect and ferromagnetic order has been observed, as in UTe. We show that all these cases can be described by a generalized Doniach phase diagram. (C) 2008 Elsevier B.V. All rights reserved.

【 授权许可】

Free