Magnetic phase diagram of the frustrated S=1/2 chain magnet LiCu_2O_2

Details Magnetic phase diagram of the frustrated S=1/2 chain magnet LiCu_2O_2 Magnetic phase diagram of the frustrated S=1/2 chain magnet LiCu_2O_2

2011-12-21

arxiv.org/abs/1112.4971v2

Phys.Rev.B, Vol.85, No.5, 054421 (2012)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.85.054421

We present the results of the magnetization and dielectric constant measurements on untwinned single crystal samples of the frustrated S=1/2 chain cuprate LiCu_2O_2. Novel magnetic phase transitions were observed. A spin flop transition of the spiral spin plane was observed for the field orientations H||a,b. The second magnetic transition was observed at H~15 T for all three principal field directions. This high field magnetic phase is discussed as a collinear spin-modulated phase which is expected for an S=1/2 nearest-neighbor ferromagnetic and next-nearest-neighbor antiferromagnetic chain system.

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