Mixed magnetic phase in 6H-type BaFeO3-δ

Kazuhiro Mori, Takashi Kamiyama, Hisao Kobayashi, Toshiya Otomo, Kusuo Nishiyama, Masaaki Sugiyama, Keiji Itoh, Toshiharu Fukunaga, Susumu Ikeda

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Abstract

The magnetic state in 6H-type BaFeO3-δ at low temperature was studied using small-angle neutron scattering, positive-muon spin relaxation and magnetization measurements. These experiments demonstrate the appearance of two different types of magnetic states: an antiferromagnetic ordering with a long-range correlation and magnetic domains with a short-range correlation. The antiferromagnetic Fe spin arrangement occurs below 130 K. In contrast, the magnetic domains are formed below 170 K and the average size of the magnetic domains was estimated as ∼124 Å. These results explain the discrepancy of the Néel temperatures between three measurement techniques: magnetization, neutron powder diffraction and Mössbauer measurements. Furthermore, it was found that the magnetic domains coexist with the long-range antiferromagnetic ordering below 130 K.

Original languageEnglish
JournalJournal of Applied Crystallography
Volume40
Issue numberSUPPL. 1
DOIs
Publication statusPublished - Apr 2007
Externally publishedYes

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Keywords

  • Antiferromagnetic ordering
  • BaFeO
  • Magnetic domains
  • Magnetization
  • Positive-muon spin relaxation
  • SANS

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Structural Biology

Cite this

Mori, K., Kamiyama, T., Kobayashi, H., Otomo, T., Nishiyama, K., Sugiyama, M., Itoh, K., Fukunaga, T., & Ikeda, S. (2007). Mixed magnetic phase in 6H-type BaFeO3-δ. Journal of Applied Crystallography, 40(SUPPL. 1). https://doi.org/10.1107/S0021889807001653