Magneto-heat capacity study on Kondo lattice system Ce(Ni1−xCux)2Al3
Magneto-heat capacity study on Kondo lattice system Ce(Ni1−xCux)2Al3
复制标题
近藤晶格系Ce(Ni1−xCux)2Al3的磁热容研究
DOI：
10.1007/s12034-016-1157-3
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发表时间：
2016
影响因子：
1.8
通讯作者：
V. Ganesan
中科院分区：
文献类型：
--
作者：
Sankararao Yadam;Durgesh Singh;D. Venkateshwarlu;M. Gangrade;S. Samatham;V. Ganesan
近藤晶格系统Ce（Ni 1 −xCux）2Al 3在磁场存在下的热容研究报告为x = 0.0−0.4。像x = 0.3和0.4这样的中间组合物的物理性质因其增强的热电功率而已知，因此已经以额外的兴趣进行了分析。X射线衍射分析表明，x = 0.3和0.4的体系在样品纯度方面均为单相，且随着体系中Cu掺杂量的增加，体系中的相更容易稳定。利用多能级肖特基效应分析了在强磁场作用下Cp/T低于10 K的低温升现象。随着外加磁场的增加，体系的总角动量J逐渐减小，表明Ce ~（3+）磁矩被屏蔽，同时体系稳定在费米液态。由此看到的筛选与对这些样品的电导率测量的预期一致。
Heat capacity studies on the Kondo lattice system Ce(Ni1−xCux)2Al3, in the presence of magnetic fields, were reported for x = 0.0−0.4. The physical properties of the intermediate compositions like x = 0.3 and 0.4 were known for their enhanced thermoelectric power and hence have been analysed with an extra interest. It was also shown from the X-ray diffraction that these systems with x = 0.3 and 0.4 were in single phase in terms of sample purity and it stabilized the phases easily with the increase in the Cu doping in the system. The low temperature rise in Cp/T below 10 K under the influence of high magnetic fields was analysed using a multi-level Schottky effect. A gradual decrease of the total angular momentum (J) with the increase of applied magnetic fields indicated a scenario of screening of Ce3+ magnetic moment while simultaneously the system settled for the Fermi liquid state. The screening thus seen was in line with the expectations of electrical conductivity measurements on these samples.