Magnetic structure of the frustrated S = 1/2 chain magnet LiCu2O2 doped with nonmagnetic Zn

Bush A. A.; Buttgen N.; Gippius A. A.; Glazkov V.N.; Kraetschmer W.; Prozorova L. A.; Svistov L. E.; Vasiliev A. M.; Zheludev A.

doi:10.1103/PhysRevB.88.104411

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Magnetic structure of the frustrated S = 1/2 chain magnet LiCu2O2 doped with nonmagnetic Zn

Physical Review B: Condensed Matter and Materials Physics. 2013. Vol. 88. P. 104411.

Bush A. A., Buttgen N., Gippius A. A., Glazkov V.N., Kraetschmer W., Prozorova L. A., Svistov L. E., Vasiliev A. M., Zheludev A.

In press

We present the results of magnetization, electron spin resonance (ESR), and nuclear magnetic resonance (NMR)
measurements on single-crystal samples of the frustrated S = 1/2 chain cuprate LiCu2O2 dopedwith nonmagnetic
Zn2+.As shown by the x-ray techniques, the crystals of Li(Cu1−xZnx )2O2 withx < 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 Cu2+ ions in this structure is close to the value obtained for undoped crystals:
(0.8 ± 0.1) μB.

Research target: Physics

Language: English

DOI

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Keywords: ядерный магнитный резонанс antiferromagnetism antiferromagnetic resonance низкоразмерные магнетики low-dimensional magnets антиферромагнитный резонанс

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