Doniach diagram for ordered, disordered and underscreened Kondo lattices

B. Coqblin; J. R. Iglesias; N. B. Perkins; S. G. Magalhães; F. M. Zimmer

doi:10.1016/j.jmmm.2008.02.101

Doniach diagram for ordered, disordered and underscreened Kondo lattices

B. Coqblin, J. R. Iglesias, N. B. Perkins, S. G. Magalhães, F. M. Zimmer

Physics and Astronomy (Twin Cities)

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Abstract

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 CeCu_x Ni_{1 - 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.

Original language	English (US)
Pages (from-to)	1989-1994
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	320
Issue number	14
DOIs	https://doi.org/10.1016/j.jmmm.2008.02.101
State	Published - Jul 2008

Keywords

Cerium compounds
Kondo lattice
Underscreened Kondo effect
Uranium compounds

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10.1016/j.jmmm.2008.02.101

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abstract = "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 CeCux Ni1 - 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.",

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T1 - Doniach diagram for ordered, disordered and underscreened Kondo lattices

AU - Coqblin, B.

AU - Iglesias, J. R.

AU - Perkins, N. B.

AU - Magalhães, S. G.

AU - Zimmer, F. M.

PY - 2008/7

Y1 - 2008/7

N2 - 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 CeCux Ni1 - 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.

AB - 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 CeCux Ni1 - 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.

KW - Cerium compounds

KW - Kondo lattice

KW - Underscreened Kondo effect

KW - Uranium compounds

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 14

ER -

Doniach diagram for ordered, disordered and underscreened Kondo lattices

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