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首页> 美国政府科技报告 >Investigation of ''Conventional'' Superconductivity in Ternary Cerium Compounds Through High Pressure Studies
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Investigation of ''Conventional'' Superconductivity in Ternary Cerium Compounds Through High Pressure Studies

机译：高压研究中三元铈化合物的“常规”超导电性研究

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The present investigation focuses on the nature and mechanism of superconductivity in the cerium-containing ternary borides and silicides: CeRu sub 3 B sub 2 , CeOs sub 3 B sub 2 , and CeRu sub 3 Si sub 2 . These are the only ternary cerium compounds where ''conventional'' (as opposed to heavy fermion) superconductivity has been observed to date. The closely related crystal structures (all related to the CeCo sub 3 B sub 2 -type, P6/mmm) enabled the study of the effect on superconductivity of transforming continuously from one system to the other by going across the pseudoternary series Ce(Ru/sub 1-x/Os/sub x/) sub 3 B sub 2 and CeRu sub 3 (B/sub x/Si/sub 1-x/) sub 2 . These pseudoternary systems were subjected to high external pressures using a standard hydrostatic pressure clamp for lower pressures (up to 20 kbar) and a specially designed diamond anvil cell for higher pressures (up to 66 k bar). Trends are presented for the variation of the superconducting transition temperatues with changes in external pressure. Results are also included from measurements of static magnetic susceptibility and electrical resistivity of all the materials in the series Ce(Ru/sub 1-x/Os/sub x/) sub 3 B sub 2 and CeRu sub 3 (B/sub x/Si/sub 1-x/) sub 2 . These provide some insight into the nature of the cerium valence in these compounds. (ERA citation 11:051433)

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