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H Tsujii, C R Rotundu, T Ono, B Andraka, H Tanaka and Y Takano. Magnetic phase diagram of the quasi-two-dimensional S=1/2 antiferromagnet Cs2CuBr4. AIP Conference Proceedings, 850, p. 1093, 2006.

Abstract: Cs2CuBr4 is one of the best candidates for the spin-1/2 Heisenberg antiferromagnet on the triangular lattice. To date, it is the only spin-1/2 material in which a magnetization plateau has been observed at 1/3 of the saturation magnetization the hallmark of the triangular-lattice Heisenberg antiferromagnet. We have made a detailed determination of the magnetic phase diagram of Cs2CuBr4 in magnetic fields up to 18 T, using specific-heat and magnetocaloric-effect measurements. The results for the field direction parallel to the c axis of the sample indicate that the transition between the phase at the plateau of magnetization and the adjacent ordered phases is first order. 2006 American Institute of Physics

Keywords: Cs2CuBr4, specific heat, spin-1/2 heisenberg antiferromagnet


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