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首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >THE LOW TEMPERATURE SPECIFIC HEAT OF H_(0.40)Cu_(0.37)Y_(0.23) AMORPHOUS ALLOY
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THE LOW TEMPERATURE SPECIFIC HEAT OF H_(0.40)Cu_(0.37)Y_(0.23) AMORPHOUS ALLOY

机译：H_（0.40）Cu_（0.37）Y_（0.23）非晶态合金的低温比热

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摘要

The low temperature specific heat parameters of the magnetic Ho_(0.40)Cu_(0.37)Y_(0.23) amorphous alloy have been investigated in the temperature range 2 to 50 K. The magnetic contributions to the specific heat, magnetic entropy changes, ordering temperatures, and the effective magnetic spin have been estimated for this alloy. The magnetic specific heat shows a broad shoulder with a characteristic temperature, T_m of about 23 K, followed at very low-temperatures by a Schottky-type anomaly. The value of T_m is higher than the freezing temperature, T_f (=13 K) as determined by AC susceptibility measurements. The magnetic entropy changes between 0 K and T_f (T_m) estimated to be 28 % (59 %) of the maximum theoretical value. This indicates that a substantial amount of short range-order persists above these characteristic temperatures. The behaviors of this amorphous alloy agree quite well with those of condensed rare earth amorphous systems.
机译：在2至50 K的温度范围内研究了磁性Ho_（0.40）Cu_（0.37）Y_（0.23）非晶态合金的低温比热参数。磁对比热的贡献，磁熵变，有序温度，已经估计了这种合金的有效磁自旋。磁比热显示出宽阔的肩部，其特征温度T_m约为23 K，然后在非常低的温度下出现肖特基型异常。 T_m的值高于通过AC磁化率测量确定的冻结温度T_f（= 13 K）。磁熵在0 K和T_f（T_m）之间变化，估计为最大理论值的28％（59％）。这表明在这些特征温度之上仍然存在大量的短程有序。这种非晶态合金的性能与冷凝稀土非晶态系统的性能非常吻合。

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