Magnetic phase diagram of the S = 1/2 antiferromagnetic ladder (CH3)2CHNH3CuCl3
Magnetic phase diagram of the S = 1/2 antiferromagnetic ladder (CH3)2CHNH3CuCl3
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DOI：
10.1088/1742-6596/150/4/042217
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发表时间：
2009-03
期刊：
影响因子：
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通讯作者：
H. Tsujii;Y. H. Kim;Y. Yoshida;Y. Takano;T. Murphy;K. Kanada;T. Saito;A. Oosawa;T. Goto
中科院分区：
文献类型：
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作者：
H. Tsujii;Y. H. Kim;Y. Yoshida;Y. Takano;T. Murphy;K. Kanada;T. Saito;A. Oosawa;T. Goto
（CH_3）_2CHNH_3CuCl_3是S = 1/2自旋梯的最佳实验室模型之一。我们已经确定了低场自旋液体和该化合物的场诱导有序相之间的相边界的温度为100 mK，通过比热和磁热效应测量两个晶体取向，与磁场垂直于所谓的B或C平面。反铁磁有序的临界场显示幂律依赖于温度，表明玻色-爱因斯坦凝聚的自旋三重态由于关闭的能隙的字段。
(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.