NMR and local-density-approximation evidence for spiral magnetic order in the chain cuprate ${\mathrm{LiCu}}_{2}{\mathrm{O}}_{2}$

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NMR and local-density-approximation evidence for spiral magnetic order in the chain cuprate ${LiCu}_{2} O_{2}$

A. A. Gippius, E. N. Morozova, A. S. Moskvin, A. V. Zalessky, A. A. Bush, M. Baenitz, H. Rosner, and S.-L. Drechsler

Phys. Rev. B 70, 020406(R) – Published 26 July 2004

Abstract

We report on ${}^{6, 7}{Li}$ nuclear magnetic resonance measurements of the spin-chain compound ${LiCu}_{2} O_{2}$ 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. ${}^{7}{Li}$ 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.

Received 5 September 2003

DOI:https://doi.org/10.1103/PhysRevB.70.020406

Authors & Affiliations

A. A. Gippius¹, E. N. Morozova¹, A. S. Moskvin², A. V. Zalessky^3,*, A. A. Bush⁴, M. Baenitz⁵, H. Rosner⁵, and S.-L. Drechsler⁶

¹Moscow State University, 119899, Moscow, Russia
²Ural State University, 620083, Ekaterinburg, Russia
³Institute of Crystallography, RAS, 117333, Moscow, Russia
⁴Moscow Institute of Radiotechnics, Electronics and Automation, 117464, Moscow, Russia
⁵Max Planck Institut für Chemische Physik fester Stoffe, D-01187, Dresden, Germany
⁶Leibniz-Institut für Festkörper- und Werkstoffforschung IFW Dresden, D-01171, Dresden, Germany

^*Deceased.

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Vol. 70, Iss. 2 — 1 July 2004

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Physical Review B

covering condensed matter and materials physics

NMR and local-density-approximation evidence for spiral magnetic order in the chain cuprate ${LiCu}_{2} O_{2}$

A. A. Gippius, E. N. Morozova, A. S. Moskvin, A. V. Zalessky, A. A. Bush, M. Baenitz, H. Rosner, and S.-L. Drechsler

Phys. Rev. B 70, 020406(R) – Published 26 July 2004

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Physical Review B

covering condensed matter and materials physics

NMR and local-density-approximation evidence for spiral magnetic order in the chain cuprate LiCu2O2

A. A. Gippius, E. N. Morozova, A. S. Moskvin, A. V. Zalessky, A. A. Bush, M. Baenitz, H. Rosner, and S.-L. Drechsler

Phys. Rev. B 70, 020406(R) – Published 26 July 2004

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NMR and local-density-approximation evidence for spiral magnetic order in the chain cuprate ${LiCu}_{2} O_{2}$