Electrical measurements on praseodymium metal to 179 GPa using designer diamond anvils
Electrical measurements on praseodymium metal to 179 GPa using designer diamond anvils
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DOI：
10.1063/1.1645986
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发表时间：
2004-02-09
影响因子：
4
通讯作者：
Weir, ST
中科院分区：
文献类型：
--
作者：
Velisavljevic, N;MacMinn, KM;Weir, ST
轻稀土金属和超钚锕系金属的电磁性质是研究高压缩下f壳层离域现象的重要材料。采用金刚石压砧技术，在室温下对179 GPa压力下的轻稀土金属镨进行了灵敏的电四探针测量。我们记录了在一系列高压实验中，在20 GPa的压力下电阻率平均下降53%。电阻率的这种大幅度下降为20 GPa相变确实与f-电子离域有关的观点提供了最有力的实验证据。我们的研究结果表明，精确的电测量非常适合f-离域研究，特别是在结构数据不提供明确的证据，这种转变。(C)2004年，美国物理学会。
The electrical and magnetic properties of light rare-earth metals and trans-plutonium actinide metals are of interest to study the f-shell delocalization phenomenon under high compressions. Using designer diamond anvil technology, sensitive electrical four-probe measurements were performed on light rare-earth metal praseodymium to pressures of 179 GPa at room temperature. We document an average drop in resistivity of 53% at a pressure of 20 GPa in a series of high-pressure experiments. This large drop in resistivity provides the strongest experimental evidence yet for the view that the 20 GPa phase transition is indeed associated with f-electron delocalization. Our results show that the precise electrical measurements are ideally suited for f-delocalization studies, especially where structural data do not provide clear evidence of this transition. (C) 2004 American Institute of Physics.