NMR and local-density-approximation evidence for spiral magnetic order in the chain cuprate LiCu2O2 -: art. no. 020406

被引：132

作者：

Gippius, AA ^{[1
]}

Morozova, EN

Moskvin, AS

Zalessky, AV

Bush, AA

Baenitz, M

Rosner, H

Drechsler, SL

机构：

[1] Moscow MV Lomonosov State Univ, Moscow 119899, Russia

[2] Ural State Univ, Ekaterinburg 620083, Russia

[3] Russian Acad Sci, Inst Crystallog, Moscow 117333, Russia

[4] Moscow Inst Radiotech Elect & Automat, Moscow 117464, Russia

[5] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany

[6] Leibniz Inst Festkorper & Werkstoffforsch IFW Dre, D-01171 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.70.020406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on Li-6,Li-7 nuclear magnetic resonance measurements of the spin-chain compound LiCu2O2 in the paramagnetic and magnetically ordered states. Below 24 K the NMR line shape shows a clear signature of incommensurate (IC) static modulation of the local magnetic field consistent with an IC spiral modulation of the magnetic moments. Li-7 NMR reveals strong phason-like dynamical fluctuations extending well below 24 K. A series of phase transitions at 24.2, 22.5, and 9 K is observed. Local density approximation based calculations of exchange integrals reveal a large in-chain frustration leading to a magnetical spiral.

引用

页码：020406 / 1

页数：4

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