Helicoidal magnetic order in the spin-chain compound NaCu2O2 -: art. no. 140402

被引：95

作者：

Capogna, L ^{[1
]}

Mayr, M ^{[1
]}

Horsch, P ^{[1
]}

Raichle, M ^{[1
]}

Kremer, RK ^{[1
]}

Sofin, M ^{[1
]}

Maljuk, A ^{[1
]}

Jansen, M ^{[1
]}

Keimer, B ^{[1
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.71.140402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report susceptibility, specific heat, and neutron diffraction measurements on NaCu2O2, a spin-1/2 chain compound isostructural to LiCu2O2, which has been extensively investigated. Below 12 K, we find a long-range ordered, incommensurate magnetic helix state with a propagation vector similar to that of LiCu2O2. In contrast to the Li analog, substitutional disorder is negligible in NaCu2O2. We can thus rule out that the helix is significantly influenced by impurities. A spin Hamiltonian with frustrated longer-range exchange interactions provides a good description of both the ordered state and the paramagnetic susceptibility.

引用

页数：4

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