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首页> 外文期刊>Physica, B. Condensed Matter >Anisotropic magnetic behavior of PrAg _2Ge _2 - A crystal field study
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Anisotropic magnetic behavior of PrAg _2Ge _2 - A crystal field study

机译：PrAg _2Ge _2的各向异性磁行为-晶体场研究

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摘要

A crystal field (CF) analysis of the experimental, single crystal magnetic susceptibility data (3001.8 K) along and perpendicular to the [0 0 1] axis, of the Ag based rare earth intermetallic compound PrAg _2Ge _2, has been carried out for the first time, thus yielding first reliable set of CF parameters for the system. The susceptibility feature at 12 K is possibly due to CF effects rather than the magnetic order as proposed earlier. This removes the issue of the transition temperature being too large to scale properly with the de Gennes factor. We have used the set of CF parameters to find the Stark energies of the ground state and the excited states together with their corresponding eigenvectors, and the thermal variation of the magnetic specific heat. Possible explanation of the absence of magnetic ordering of the Pr sublattice and the nature of variation of the CF parameters with the substitution of transition-metal ion in PrAg _2Ge _2 is studied and discussed in relation to PrAu _2Ge _2. All computations have been carried out using the intermediate coupling scheme including the J-mixing.
机译：对该银基稀土金属间化合物PrAg _2Ge _2沿[0 0 1]轴并垂直于该轴的实验单晶磁化率数据（3001.8 K）进行了晶体场（CF）分析。第一次，因此产生了系统的第一组可靠的CF参数。 12 K时的磁化率特性可能是由于CF效应而不是先前提出的磁阶。这样就消除了过渡温度太大而无法按de Gennes因子适当缩放的问题。我们使用这组CF参数来找到基态和激发态的Stark能量及其对应的特征向量，以及磁比热的热变化。研究并讨论了与PrAu _2Ge _2相关的Pr子晶格不存在磁有序性和CF参数变化的性质，用过渡金属离子替代PrAg _2Ge _2的可能解释。所有计算均使用包括J混合在内的中间耦合方案进行。

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