Spin-orbital locked magnetic excitations in a half-metallic double perovskite Ba2FeReO6

K. W. Plumb; A. M. Cook; J. P. Clancy; A. I. Kolesnikov; B. C. Jeon; T. W. Noh; A. Paramekanti; Young-June Kim

doi:10.1103/PhysRevB.87.184412

Spin-orbital locked magnetic excitations in a half-metallic double perovskite Ba2FeReO6

Strongly Correlated Electrons 2013-06-04 v1 Materials Science

Authors: K. W. Plumb , A. M. Cook , J. P. Clancy , A. I. Kolesnikov , B. C. Jeon , T. W. Noh , A. Paramekanti , Young-June Kim

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Abstract

We present a powder inelastic neutron scattering study of magnetic excitations in Ba $_2$ FeReO $_6$ , a member of the double perovskite family of materials which exhibit half-metallic behavior and high Curie temperatures. We find clear evidence of two well-defined dispersing magnetic modes in its low temperature ferrimagnetic state. We develop a local moment model, which incorporates the interaction of Fe spins with spin-orbit locked magnetic moments on Re, and show that this captures our experimental observations. Our study further opens up double perovskites as model systems to explore the interplay of strong correlations and spin-orbit coupling in 5d transition metal oxides.

Keywords

double perovskite Ba2FeReO6 half-metallic magnetic excitations inelastic neutron scattering spin-orbit coupling local moment model

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@article{arxiv.1301.0327,
  title  = {Spin-orbital locked magnetic excitations in a half-metallic double perovskite Ba2FeReO6},
  author = {K. W. Plumb and A. M. Cook and J. P. Clancy and A. I. Kolesnikov and B. C. Jeon and T. W. Noh and A. Paramekanti and Young-June Kim},
  journal= {arXiv preprint arXiv:1301.0327},
  year   = {2013}
}

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7 pages 5 figures

Spin-orbital locked magnetic excitations in a half-metallic double perovskite Ba2FeReO6

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