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| VOLUME 93 (2011) | ISSUE 1 | PAGE 24 |
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New high magnetic field phase of the frustrated S=1/2 chain compound LiCuVO4
L. E. Svistov+*, T. Fujita*, H. Yamaguchi*, S. Kimura*, K. Omura*, A. Prokofiev
 , A. I. Smirnov , Z. Honda , M. Hagiwara*+P.L. Kapitza Institute for Physical Problems RAS, 119334 Moscow, Russia *KYOKUGEN, Osaka University, 560-8531 Toyanaka, Japan Graduate School of Science and Enginering, Saitama University, 338-8570 Saitama, Japan Institut für Festkörperphysik Technische Universität Wien, A-1040 Wien, Austria Moscow Institute for Physics and Technology, 141700 Dolgoprudny, Russia
Abstract
Magnetization of the frustrated S=1/2 chain compound LiCuVO4, focusing on high magnetic field phases, is reported. Besides a spin-flop transition and the transition from a planar spiral to a spin modulated structure observed recently, an additional transition was observed just below the saturation field. This newly observed magnetic phase is considered as a spin nematic phase, which was predicted theoretically but was not observed experimentally. The critical fields of this phase and its dM/dH curve are in good agreement with calculations performed in a microscopic model (M. E. Zhitomirsky and H. Tsunetsugu, Europhys. Lett. 92, 37001 (2010)). |