Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe $_{2}$ Se $_{3}$

Nambu, Yusuke*; Ogushi, Kenya*; Suzuki, Shumpei*; Du, F.*; Avdeev, M.*; Uwatoko, Yoshiya*; Munakata, Koji*; Fukazawa, Hiroshi; Chi, S.*; Ueda, Yutaka*; Sato, Taku*

Magnetism in the insulating BaFe $_{2}$ Se $_{3}$ was examined through susceptibility, specific heat, resistivity and neutron diffraction measurements. After formation of a short-range magnetic correlation, a long-range ordering was observed below $T_{rm N}$ 255 K. The transition is obscured by bulk properties. Magnetic moments are arranged to form a Fe $_{4}$ ferromagnetic unit, and each Fe $_{4}$ stacks antiferromagnetically. This block magnetism is of the third type among magnetic structures of ferrous materials. The magnetic ordering drives unusually large distortion via magnetoelastic coupling.

Language	:	English
Journal	:	Physical Review B
Volume	:	85
Number	:	6
Pages	:	p.064413_1 - 064413_5
Publication Year/Month	:	2012/02
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Paper URL	:	https://doi.org/10.1103/PhysRevB.85.064413
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	中性子回折; 磁性
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Registration No. : AA20140784
JAEA Abstracts No. :
Paper Submission No. : 28454

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Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFeSe

Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe $_{2}$ Se $_{3}$