Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 underpressure

Y. Kawasaki, K. Ishida, T. Mito, C. Thessieu, G. Q. Zheng, Y. Kitaoka, K. Asayama, C. Geibel, F. Steglich

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

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 Ce1+xCu2+ySi2. Ce0.99Cu2.02Si2 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 Tc 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 Ce0.975Cu2Si2 which undergoes a static magnetic ordering (SMO) at ambient P below TN ∼ 0.6 K, no superconductivity has been induced up to 19.4 kbar.

Original languageEnglish
Pages (from-to)14-15
Number of pages2
JournalPhysica B: Condensed Matter
Volume281-282
DOIs
Publication statusPublished - Jan 1 2000
Externally publishedYes
EventYamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) - Nagano, Japan
Duration: Aug 24 1999Aug 28 1999

Keywords

  • CeCuSi
  • NQR
  • Pressure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Kawasaki, Y., Ishida, K., Mito, T., Thessieu, C., Zheng, G. Q., Kitaoka, Y., Asayama, K., Geibel, C., & Steglich, F. (2000). Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 underpressure. Physica B: Condensed Matter, 281-282, 14-15. https://doi.org/10.1016/S0921-4526(99)01172-2