Magnetic structure of the frustrated S=1/2 chain magnet LiCu2O2 doped with nonmagnetic Zn
| Autor: | Bush, A. A., Büttgen, N., Gippius, A. A., Glazkov, V. N., Kraetschmer, W., Prozorova, L. A., Svistov, L. E., Vasiliev, A. M., Zheludev, A., Farutin, A. M. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Phys. Rev. B, 88, 104411 (2013) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.88.104411 |
| Popis: | We present the results of magnetization, ESR and NMR measurements on single crystal samples of the frustrated S=1/2 chain cuprate LiCu2O2 doped with nonmagnetic Zn^2+. As shown by the x-ray techniques the crystals of Li(Cu{1-x}Zn{x})2O2 with x<0.12 are single-phase, whereas for higher Zn concentrations the samples were polyphase. ESR spectra for all monophase samples (0<= x<0.12) can be explained within the model of a planar spin structure with a uniaxial type anisotropy. The NMR spectra of the highly doped single crystal sample Li(Cu0.9Zn0.1)2O2 can be described in the frame of a planar spin glass like magnetic structure with short range spiral correlations in the crystal (ab)-planes with strongest exchange bonds. The value of magnetic moments of Cu^2+ ions in this structure is close to value obtained for undoped crystals: (0.8 +- 0.1) mu_B. Comment: 12 pages, 10 figures |
| Databáze: | arXiv |
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