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Temperature-dependent local exchange splitting in SrRuO3

J. S. Dodge, E. Kulatov, L. Klein, C. H. Ahn, J. W. Reiner, L. Miéville, T. H. Geballe, M. R. Beasley, A. Kapitulnik, H. Ohta, Yu. Uspenskii, and S. Halilov
Phys. Rev. B 60, R6987(R) – Published 1 September 1999
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Abstract

Optical and magneto-optical data from the perovskite itinerant ferromagnet SrRuO3 are presented and compared to fully relativistic, local spin-density approximation band-structure calculations. We find that the basic features of the optical data are well described by the ferromagnetic band calculation. To test recent predictions that the ferromagnetic transition in SrRuO3 is driven by long-wavelength longitudinal spin fluctuations, we track the temperature dependence of the O(2p)Ru(4d) interband transition which we observe in the magneto-optic conductivity. The absence of significant changes in the energy of this transition suggests that the ferromagnetic order is destroyed largely through transverse, not longitudinal, fluctuations of the ferromagnetic moment. We discuss the implications of these observations for the electronic structure of the ruthenium perovskites.

  • Received 15 June 1999

DOI:https://doi.org/10.1103/PhysRevB.60.R6987

©1999 American Physical Society

Authors & Affiliations

J. S. Dodge

  • Edward Ginzton Laboratories, Stanford University, Stanford, California 94305
  • Materials Sciences Division, Lawrence Berkeley Laboratories, Berkeley, California 94720

E. Kulatov*

  • Venture Business Laboratory, Kobe University, Rokkodai 1-1, Nada, Kobe 657, Japan

L. Klein, C. H. Ahn, J. W. Reiner, L. Miéville, T. H. Geballe, M. R. Beasley, and A. Kapitulnik

  • Edward Ginzton Laboratories, Stanford University, Stanford, California 94305

H. Ohta

  • Department of Physics, Faculty of Science, Kobe University, Rokkodai 1-1, Nada, Kobe 657, Japan

Yu. Uspenskii

  • Tamm Theory Department, P.N. Lebedev Physical Institute, Russian Academy of Sciences, 117924 Leninskii avenue 53, Moscow, Russia

S. Halilov

  • Max-Planck Arbeitsgruppe “Elektronensysteme,” Technische Universitaet, D-01062 Dresden, Germany

  • *On leave from General Physics Institute, Russian Academy of Sciences, Moscow, Russia.
  • Present address: Department of Physics, Bar-Ilan University, Ramat-Gan, Israel.
  • Present address: Département de Physique de la Materière Condensée, University of Geneva, Geneva, Switzerland.

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Vol. 60, Iss. 10 — 1 September 1999

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