Magnetic phase diagram of the S 1/2 antiferromagnetic ladder (CH 3)2CHNH3CuCl3

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Abstract

(CH3)2CHNH3CuCl3 is one of the best laboratory models for the S 1/2 spin ladder comprising ferromagnetic rungs and antiferromagnetic legs. We have determined the phase boundary between the low-field spin liquid and the field-induced ordered phase of this compound to 100 mK in temperature by means of specific-heat and magnetocaloric-effect measurements for two crystal orientations, with the magnetic field perpendicular to either the so-called B or C plane. The critical field of antiferromagnetic ordering shows power-law dependences on temperature, indicative of the Bose-Einstein condensation of spin triplets due to closing of the energy gap by the field. © 2009 IOP Publishing Ltd.

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Tsujii, H., Kim, H., Yoshida, Y., Takano, Y., Murphy, P., Kanada, K., … Goto, T. (2009). Magnetic phase diagram of the S 1/2 antiferromagnetic ladder (CH 3)2CHNH3CuCl3. In Journal of Physics: Conference Series (Vol. 150). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/150/4/042217

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