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Energy dispersive in situ high pressure study of stoichiometric and non-stoichiometric rare earth coppersilicides

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Zitation

Spain, I. L., Steglich, F., Rauchschwalbe, U., & Hochheimer, H. D. (1986). Energy dispersive in situ high pressure study of stoichiometric and non-stoichiometric rare earth coppersilicides. Physica B+C, 139(1-3), 449-452. doi:10.1016/0378-4363(86)90620-0.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0019-CF1C-E
Zusammenfassung
The Kondo Lattice compound CeCu2Si2 has generated considerable interest, because of the observation of bulk superconductivity below which is believed to be connected with “heavy fermions.“ Recently the results of a high pressure study of the electrical resistivity of CeCu2Si2 down to the sub Kelvin temperature range have been interpreted on the basis of a valence transition associated with a steep increase of the superconducting critical temperature Tc to about 2 K near 25 kbar. The purpose of the present high pressure study was to see if evidence could be found for such a valence transition, by looking for anomalies in the p-V curves of CeCu2Si2. At the same time non-stoichiometric CeCu2Si2 samples, which are not superconducting, were investigated, to remove any ambiguity in the interpretation of the results. The compounds LaCu2Si2 and YCu2Si2 were also studied.