Complex-Orbital Ordering and Verwey Transition in Fe3O4

• Uzu Hisashi

  Department of Quantum Matters, ADSM, Hiroshima University

• Tanaka Arata

  Department of Quantum Matters, ADSM, Hiroshima University

Bibliographic Information

Other Title

• Complex-Orbital Ordering and Verwey Transition in Fe₃O₄

Abstract

The charge and orbital orderings above and below the Verwey transition in magnetite (Fe₃O₄) have been investigated using a three-band model for electrons with minority spins in the t_2g orbitals on the B sites with a mean-field approximation. For the high-temperature phase above the Verwey transition, an orbital ordered state with spontaneous breaking of the time reversal symmetry having noncollinear orbital moments is obtained as the lowest energy solution. The result is in contrast to usual magnetic materials, in which the orbital moments are induced by ordered spins via the spin–orbit interaction. For the low-temperature phase, a similar orbital ordering with longer periodicity accompanied by charge disproportionation caused by a monoclinic lattice distortion is proposed.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 75 (4), 043704-, 2006

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• Fe<SUB>3</SUB>O<SUB>4</SUB>
• Verwey transition
• complex orbital order
• charge order
• noncollinear orbital moment

Details

• CRID: 1390282679166452352
• NII Article ID: 110004729247
• NII Article ID: 210000106074
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.75.043704
• BIBCODE: 2006JPSJ...75d3704U
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 7882234
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7882234
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.75.043704
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed