Induced-Moment Weak Antiferromagnetism and Orbital Order on the Itinerant-Localized Duality Model with Nested Fermi Surface: A Possible Origin of Exotic Magnetism in URu${}_{2}$Si$_{2}$

Yukihiro Okuno; Kazumasa Miyake

doi:10.1143/JPSJ.67.2469

paper

Induced-Moment Weak Antiferromagnetism and Orbital Order on the Itinerant-Localized Duality Model with Nested Fermi Surface: A Possible Origin of Exotic Magnetism in URu $_{2}$ Si $_{2}$

arXiv:cond-mat/9804127 · doi:10.1143/JPSJ.67.2469

Abstract

The weak antiferromagnetism of URu $_{2}$ Si $_{2}$ is discussed on the basis of a duality model which takes into account salient features of both itinerant fermions and "localized" component of spin degrees of freedom. The problem is analyzed in the framework of induced-moment mechanism by taking a singlet-singlet crystal field scheme together with the nesting property of partial Fermi surface of itinerant fermions . It is shown that the extremely small ordered moment $m$ of $O$ ( $1 0^{- 2}$ $\times$ $μ_{B}$ ) can be compatible with the large specific-heat jump at the transition temperature $T_{N}$ . Analysis performed in the presence of external magnetic field shows that the field dependence of $m$ in the limit T\to 0 and T_{N}$ do not scale except very near the critical field B which is consistent with a recent observation by Mentink. It is also shown that the antiferromagnetic magnetic order gives rise to a tiny amount of antiferromagnetic orbital order of f-electrons.

14 pages, 2 figure PS file, accepted J. Phys. Soc. Jpn

Induced-Moment Weak Antiferromagnetism and Orbital Order on the Itinerant-Localized Duality Model with Nested Fermi Surface: A Possible Origin of Exotic Magnetism in URu $_{2}$ Si $_{2}$

Abstract

References in corpus (2)

Cited by in corpus (18)

Induced-Moment Weak Antiferromagnetism and Orbital Order on the Itinerant-Localized Duality Model with Nested Fermi Surface: A Possible Origin of Exotic Magnetism in URu2​Si2​

Abstract

References in corpus (2)

Cited by in corpus (18)

Induced-Moment Weak Antiferromagnetism and Orbital Order on the Itinerant-Localized Duality Model with Nested Fermi Surface: A Possible Origin of Exotic Magnetism in URu $_{2}$ Si $_{2}$