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27 April 2024

» arxiv » 0808.0281

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Multiferroicity in the spin-1/2 quantum matter of LiCu2O2
A. Rusydi ; I. Mahns ; S. Mueller ; M. Ruebhausen ; S. Park ; Y.J. Choi ; C. L. Zhang ; S-W. Cheong ; S. Smadici ; P. Abbamonte ; M. v. Zimmermann ; G. A. Sawatzky ;
Date:	2 Aug 2008
Abstract:	Multiferroicity in LiCu2O2 single crystals is studied using resonant soft x-ray magnetic scattering, hard x-ray diffraction, heat capacity, magnetic susceptibility, and electrical polarization. Two magnetic transitions are found at 24.6 K (T1) and 23.2 K (T2). Our data are consistent with a sinusoidal spin structure at T2<T<T1 and with a helicoidal spin structure at T<T2 giving rise to ferroelectricity. Surprisingly, above T2 the correlation lengths of the spin structures increase as the temperature increases with dramatic changes of ~42% along the c-axis. Our results demonstrate the interplay of the geometrical frustration and the electronic and magnetic polarizations.
Source:	arXiv, 0808.0281
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