Magnetic Phase Transition and Magnetization Plateau in Cs₂CuBr₄
Tanaka, H. · Ono, T. · Katori, H. A. · Mitamura, H. · Ishikawa, F. · Goto, T.
Original · EN
The crystal structure of Cs₂CuBr₄ is the same as that of Cs₂CuCl₄, which has been characterized as a spin-1/2 quasi-two-dimensional frustrated system. The magnetic properties of Cs₂CuBr₄ were investigated by magnetization and specific heat measurements. The phase transition at zero magnetic field was detected at T N=1.4 K. It was observed that the magnetization curve has a plateau at about one-third of the saturation magnetization for magnetic field H parallel to the b- and c-axes, while no plateau was observed for H∥ a. The field-induced phase transition to the plateau state appears to be of the first order. The mechanism leading to the magnetization plateau is discussed.
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