Electronic structure, dynamic susceptibility, and Néel temperature of the heavy-fermion magnet UCu5

M. R. Norman, B. I. Min, T. Oguchi, Arthur J Freeman

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A formalism for treating both spin and orbital moment effects within the linearized muffin-tin orbital method is applied to the heavy-fermion magnet UCu5. A magnetic moment of 1.1μB is found, in agreement with neutron-scattering data, which indicate a moment of 1.3μB. Moreover, the calculation finds that 70% of the density of states at EF is removed at the magnetic phase transition, in rough agreement with specific-heat data, which reveal a 60% reduction. Using a modification of the spin-fluctuation formalism of Moriya, we calculate a Néel temperature of 12 K, close to the experimental value of 15 K. Finally, a simple method for calculating the dynamic susceptibility including spin-orbit effects is introduced and used to discuss the nature of the two phase transitions observed in UCu5. We find that the renormalized dynamic susceptibility has a peak corresponding in energy to the neutron-scattering linewidth.

Original languageEnglish
Pages (from-to)6818-6823
Number of pages6
JournalPhysical Review B
Volume38
Issue number10
DOIs
Publication statusPublished - 1988

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Fermions
Neutron scattering
Electronic structure
Magnets
magnets
fermions
Phase transitions
electronic structure
magnetic permeability
Spin fluctuations
Tin
neutron scattering
Magnetic moments
Linewidth
formalism
Specific heat
moments
orbitals
Orbits
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Electronic structure, dynamic susceptibility, and Néel temperature of the heavy-fermion magnet UCu5. / Norman, M. R.; Min, B. I.; Oguchi, T.; Freeman, Arthur J.

In: Physical Review B, Vol. 38, No. 10, 1988, p. 6818-6823.

Research output: Contribution to journalArticle

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