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

doi:10.1107/S0021889807001653

Mixed magnetic phase in 6H-type BaFeO_3-δ

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

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

The magnetic state in 6H-type BaFeO_3-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 language	English
Pages (from-to)	s501-s505
Journal	Journal of Applied Crystallography
Volume	40
Issue number	SUPPL. 1
DOIs	https://doi.org/10.1107/S0021889807001653
Publication status	Published - Apr 2007
Externally published	Yes

Keywords

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

ASJC Scopus subject areas

Biochemistry, Genetics and Molecular Biology(all)

Access to Document

10.1107/S0021889807001653

Cite this

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title = "Mixed magnetic phase in 6H-type BaFeO3-δ",

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 {\AA}. These results explain the discrepancy of the N{\'e}el temperatures between three measurement techniques: magnetization, neutron powder diffraction and M{\"o}ssbauer measurements. Furthermore, it was found that the magnetic domains coexist with the long-range antiferromagnetic ordering below 130 K.",

keywords = "Antiferromagnetic ordering, BaFeO, Magnetic domains, Magnetization, Positive-muon spin relaxation, SANS",

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

year = "2007",

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T1 - Mixed magnetic phase in 6H-type BaFeO3-δ

AU - Mori, Kazuhiro

AU - Kamiyama, Takashi

AU - Kobayashi, Hisao

AU - Otomo, Toshiya

AU - Nishiyama, Kusuo

AU - Sugiyama, Masaaki

AU - Itoh, Keiji

AU - Fukunaga, Toshiharu

AU - Ikeda, Susumu

PY - 2007/4

Y1 - 2007/4

N2 - 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.

AB - 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.

KW - Antiferromagnetic ordering

KW - BaFeO

KW - Magnetic domains

KW - Magnetization

KW - Positive-muon spin relaxation

KW - SANS

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