Magnetic Form Factor of α-Ce: Towards Understanding the Magnetism of Cerium

A. P. Murani, S. J. Levett, and J. W. Taylor
Phys. Rev. Lett. 95, 256403 – Published 15 December 2005

Abstract

A favored interpretation of the γα phase transition in cerium postulates the transformation of the localized 4f state in γ-Ce to a weakly correlated itinerant 4f band in α-Ce. However, results of high-energy neutron inelastic scattering measurements, presented here, show clearly that the magnetic susceptibility response from α-Ce follows the Ce3+ form factor despite the large, 30-fold, increase in its spectral width relative to that in γ-Ce. This observation provides, for the first time, indisputable evidence for the localized character of the 4f state in the α phase. The present findings appear consistent with recent calculations combining dynamical mean-field theory with the local density approximation that indicate a strongly correlated 4f state in α-Ce. The localized 4f state is also fundamental to the Kondo volume collapse theories for the γα phase transition in cerium.

  • Figure
  • Figure
  • Received 3 March 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.256403

©2005 American Physical Society

Authors & Affiliations

A. P. Murani1,*, S. J. Levett2, and J. W. Taylor2

  • 1Institut Laue Langevin, 6 Rue Jules Horowitz, 38042, Grenoble Cedex, France
  • 2ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, United Kingdom

  • *Electronic address: murani@ill.fr

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Vol. 95, Iss. 25 — 16 December 2005

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