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首页> 外文期刊>Journal of the Korean Physical Society >Specific-heat study on successive magnetic transitions in α-Dy_2S_3 single crystals under magnetic fields
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Specific-heat study on successive magnetic transitions in α-Dy_2S_3 single crystals under magnetic fields

机译：磁场作用下α-Dy_2S_3单晶连续磁跃迁的比热研究

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摘要

Specific-heat measurements in magnetic fields have been performed on α-Dy_2S_3 single crystals and have shown successive magnetic transitions at T_(N1) = 11.4 K and T_(N2) = 6.4 K. The specific heat in no magnetic field exhibits sharp peaks at both T_(N1) and T_(N2). The change in the magnetic entropy across each transition is estimated as Rln2/2 per mol-Dy, which suggests magnetic moments on only one Dy site between two crystallographically inequivalent Dy sites order at each transition temperature. When the magnetic field is applied along the b-axis of the orthorhombic system, the two peaks of the specific heat shift toward lower temperatures. On the other hand, a magnetic field perpendicular to the b-axis shifts the peaks toward higher temperatures. The TN1 shifts to 9.6 K (H {norm of matrix} b) and 12.5 K (H ⊥ b) under a magnetic field of 2 T. The T_(N2) peak broadens gradually with increasing magnetic field for each direction; consequently, the peak is obscure under a field of 2 T.
机译：已对α-Dy_2S_3单晶进行了磁场中的比热测量，并显示了在T_（N1）= 11.4 K和T_（N2）= 6.4 K时连续的磁跃迁。在没有磁场的情况下，比热在30°C处出现尖锐的峰值。 T_（N1）和T_（N2）。跨每个跃迁的磁熵变化估计为Rln2 / 2 / mol-Dy，这表明在每个跃迁温度下，两个晶体学上不等的Dy位置之间只有一个Dy位置的磁矩。当沿着正交晶体系统的b轴施加磁场时，比热的两个峰值向较低的温度移动。另一方面，垂直于b轴的磁场会将峰移向更高的温度。在2 T的磁场下，TN1移至9.6 K（H {矩阵的范数）b）和12.5 K（H⊥b）。随着每个方向上磁场的增加，T_（N2）峰逐渐变宽。因此，在2 T的磁场下，该峰不明显。

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