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- Title
Mixed magnetic phase in 6 H-type BaFeO<sub>3−δ</sub>.
- Authors
Mori, Kazuhiro; Kamiyama, Takashi; Kobayashi, Hisao; Otomo, Toshiya; Nishiyama, Kusuo; Sugiyama, Masaaki; Itoh, Keiji; Fukunaga, Toshiharu; Ikeda, Susumu
- Abstract
The magnetic state in 6 H-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.
- Subjects
NEUTRON scattering; IRON; MAGNETISM; OPTICAL diffraction; OPTICS; TEMPERATURE
- Publication
Journal of Applied Crystallography, 2007, Vol 40, ps501
- ISSN
0021-8898
- Publication type
Article
- DOI
10.1107/S0021889807001653