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7Li NMR study of the ordering phenomena in the intrinsic two-component magnetoelectric material LiZrCuOстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Moskvin A.S., Vavilova E., Drechsler S.L., Kataev V., Büchner B.
- Журнал: Physical Review B
- Том: 87
- Номер: 5
- Год издания: 2013
- Издательство: American Physical Society
- Местоположение издательства: United States
- Номер статьи: 054405
- DOI: 10.1103/physrevb.87.054405
- Аннотация: We report an experimental and theoretical study of the low temperature 7 Li nuclear magnetic resonance (NMR) spectra of oriented powder samples of γ-Li 2 ZrCuO 4 (≡ Li 2 CuZrO 4) which comprises interpenetrating sublattices of frustrated quasi-one-dimensional s= 1/2 quantum Heisenberg magnetic Cu 2+ chains and frustrated quantum Ising electric sublattice of Li I ions. Incommensurate spin order occurring in this compound at T N⋍ 6 K gives rise to a drastic change of the 7 Li NMR spectrum. We show that the peculiar NMR line shapes are determined by the specific, sample dependent, distribution of the Li I ions in the glassy ordered electric sublattice. The analysis of the NMR data in the framework of a spin-spiral model gives evidence for a remarkable interaction between magnetic and electric degrees of freedom in γ-Li 2 ZrCuO 4, which suggests it as a promising model compound for fundamental studies of complex magnetoelectric phenomena and illustrates well their richness.
- Добавил в систему: Вавилова Евгения Леонидовна