Coexisting ferromagnetic order and disorder in a uniform system of hydroxyhalide Co2(OH)3Cl

被引:51
作者
Zheng, X. G. [1 ]
Kawae, T.
Yamada, H.
Nishiyama, K.
Xu, C. N.
机构
[1] Saga Univ, Dept Phys, Saga 8408502, Japan
[2] Kyushu Univ, Fac Engn, Fukuoka 8128581, Japan
[3] Natl Inst Adv Ind Sci & Technol, Tosu, Saga 8410052, Japan
[4] High Energy Accelerator Res Org, KEK MSL, Inst Mat Struct Sci, Muon Sci Lab, Ibaraki 3050801, Japan
关键词
D O I
10.1103/PhysRevLett.97.247204
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Order or disorder often exists in a uniform spin system consisting of one kind of magnetic ion. Nevertheless, they rarely coexist in normal conditions. Our thermodynamic and microscopic magnetic studies of Co-2(OH)(3)Cl, a distorted tetrahedral lattice compound with uniform Co2+ spin, demonstrate that the spins located on one corner of the tetrahedron are periodically ordered, but those on the other three are disordered below a ferromagnetic transition at T-C=10.5 K. The partial order resembles that of the field-induced "kagome-ice" state in spin ice pyrochlore compounds. Evidence suggests that a distortion in the tetrahedron is responsible for this partial ferromagnetic order in a zero field.
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页数:4
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