Spin-Wave Theory of Magnetic Ordering in UNi4B.

Spin-Wave Theory of Magnetic Ordering in UNi4B.
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UNi4B 中磁排序的自旋波理论。

DOI:
10.1143/jpsj.66.3611
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发表时间:
1997
影响因子:
1.7
通讯作者:
A. Oguchi
A. Oguchi
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Syougo Tejima;A. Oguchi

文献摘要

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利用Heisenberg模型研究了UNi 4 B的性质.考虑自旋算符作为经典矢量,我们证明了该模型的经典基态是在基底平面上的类涡旋U自旋排列。利用自旋波方法计算了低温比热随温度的变化关系,并估算了耦合常数。由耦合常数得到转变温度TN = 8.7K。
We study properties of UNi 4 B using the Heisenberg model. Considering the spin operators as classical vectors, we show that the classical ground state of this model is the vortexlike U spin arrangement in the basal plain. By means of the spin-wave method we calculate the temperature dependence of the specific heat at low temperatures, and estimate the coupling constants. From the obtained coupling constants we get the transition temperature T N =8.7 K.