Specific heat of CeB6 under high pressure
Specific heat of CeB6 under high pressure
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CeB6 高压比热
DOI：
10.1088/0953-8984/6/46/027
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
K. Winzer
中科院分区：
文献类型：
--
作者：
S Sullow;V Trappe;A Eichler;K. Winzer
本文研究了重费米子化合物CeB_6在0.7- 4.5K、1.35GPa准流体静压下的比热。我们发现的反铁磁转变温度TN的0.1 K GPa-1和一个恒定的反铁四极转变温度TQ随着压力的增加而增加。此外，一个显着的变化，反铁磁λ异常的形状观察到，而反铁四极跃迁几乎不受压力的影响。电子比热贡献γ呈非单调变化。我们讨论了这种异常行为的伽玛和变形的lambda异常的可能机制。
The specific heat of the heavy fermion compound CeB6 has been studied under quasi-hydrostatic pressure up to 1.35 GPa in the region 0.7-4.5 K. We find an increase of the antiferromagnetic transition temperature TN of 0.1 K GPa-1 and a constant antiferroquadrupolar transition temperature TQ with increasing pressure. Additionally, a remarkable change in the shape of the antiferromagnetic lambda anomaly is observed, whereas the antiferroquadrupolar transition is hardly affected by pressure. The electronic specific heat contribution gamma shows a non-monotonic variation. We discuss possible mechanisms for this anomalous behaviour of gamma and the deformation of the lambda anomaly.