Cu-NQR study of magnetism and superconductivity in Ce 1+x Cu 2+y Si 2 under pressure
Physica B: Condensed Matter, ISSN: 0921-4526, Vol: 281, Page: 14-15
2000
- 5Citations
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- Citations5
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Article Description
In order to investigate the magnetic properties at the vicinity of magnetic to superconducting (SC) phase boundary, we have performed Cu-NQR measurements under hydrostatic pressure ( P ) on two off-stoichiometric Ce 1+x Cu 2+y Si 2. Ce 0.99 Cu 2.02 Si 2 exhibits the anomalous ground state so-called A-phase, dominated by critical magnetic correlations and affected by a presence of minor SC fraction at ambient P. With increasing P which enhances the Kondo temperature, the fraction of the A-phase is markedly suppressed, but the SC fraction is increased, although T c stays nearly constant in the range of 1 bar < P <14.4 kbar. This evidences that the P -induced A- to SC phase change is of first order. In Ce 0.975 Cu 2 Si 2 which undergoes a static magnetic ordering (SMO) at ambient P below T N ∼0.6 K, no superconductivity has been induced up to 19.4 kbar.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0921452699011722; http://dx.doi.org/10.1016/s0921-4526(99)01172-2; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0033902140&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0921452699011722; http://linkinghub.elsevier.com/retrieve/pii/S0921452699011722; http://api.elsevier.com/content/article/PII:S0921452699011722?httpAccept=text/xml; http://api.elsevier.com/content/article/PII:S0921452699011722?httpAccept=text/plain; http://dx.doi.org/10.1016/s0921-4526%2899%2901172-2; https://dx.doi.org/10.1016/s0921-4526%2899%2901172-2
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