Magnetic structure of α-FeC2O4‧2D2O

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题名:	Magnetic structure of α-FeC2O4‧2D2O
作者:	Satoru, Simizu;陳憬燕;Chen, Jiing-yann;Friedberg, S. A.;Martinez, J.;Shirane, G.
贡献者:	淡江大學物理學系
日期:	1987-04-15
上传时间:	2009-12-31 10:18:04 (UTC+8)
出版者:	American Institute of Physics (AIP)
摘要:	Long‐range spin ordering has been studied in the quasi‐one‐dimensional antiferromagnet α‐FeC2O4⋅2D2O by neutron diffraction on a powdered sample above and below T N =11.7 K. Data at 14 K show essentially the room‐temperature chemical structure. The space group is C2/c, Z=4, and unit cell dimensions are a=11.700 Å, b=5.568 Å, and c=9.847 Å with β=128.05°. Magnetic peaks appear at T N and data at 10.5 K show doubling of the unit cell along the b direction, the chain axis. The ordered structure belongs to the magnetic space group P 2b 2/n with spins parallel to the b axis. Cancellation of certain interchain interactions gives the structure a pronounced two‐dimensional character. At T 2=9.5 K a discontinuous transition to a second magnetic phase occurs with additional doubling of the unit cell in the a direction. Below T 2 the symmetry of the magnetic structure is reduced to triclinic, P 2s 1̄ with the spins deviating slightly from the b axis.
關聯:	Journal of Applied Physics 61(8), pp.3420-3422
DOI:	10.1063/1.338740
显示于类别:	[物理學系暨研究所] 期刊論文

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