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

Y. Kawasaki, K. Ishida, T. Mito, C. Thessieu, Guo-Qing Zheng, Y. Kitaoka, K. Asayama, C. Geibel, F. Steglich

Research output: Contribution to journalArticle

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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
Publication statusPublished - Jun 2000
Externally publishedYes

Fingerprint

Magnetism
Phase boundaries
Hydrostatic pressure
Superconductivity
Ground state
Magnetization
Magnetic properties
superconductivity
guy wires
hydrostatic pressure
Temperature
magnetic properties
ground state
temperature

Keywords

  • CeCuSi
  • NQR
  • Pressure

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Kawasaki, Y., Ishida, K., Mito, T., Thessieu, C., Zheng, G-Q., Kitaoka, Y., ... Steglich, F. (2000). Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 underpressure. Physica B: Condensed Matter, 281-282, 14-15.

Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 underpressure. / Kawasaki, Y.; Ishida, K.; Mito, T.; Thessieu, C.; Zheng, Guo-Qing; Kitaoka, Y.; Asayama, K.; Geibel, C.; Steglich, F.

In: Physica B: Condensed Matter, Vol. 281-282, 06.2000, p. 14-15.

Research output: Contribution to journalArticle

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, vol. 281-282, pp. 14-15.
Kawasaki Y, Ishida K, Mito T, Thessieu C, Zheng G-Q, Kitaoka Y et al. Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 underpressure. Physica B: Condensed Matter. 2000 Jun;281-282:14-15.
Kawasaki, Y. ; Ishida, K. ; Mito, T. ; Thessieu, C. ; Zheng, Guo-Qing ; Kitaoka, Y. ; Asayama, K. ; Geibel, C. ; Steglich, F. / Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 underpressure. In: Physica B: Condensed Matter. 2000 ; Vol. 281-282. pp. 14-15.
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AU - Zheng, Guo-Qing

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AB - 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.

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