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

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In order to investigate magnetic properties in the vicinity of the magnetic to superconducting (SC) phase boundary, we have performed Cu-NQR measurements under hydrostatic pressure (P) on two off-stoichiometric Ce1+xCu2+ySi2polycrystals: Ce0.99Cu2.02Si2 (denoted as Ce 0.99) exhibits the anomalous ground state so-called A phase dominated by critical magnetic correlations and Ce0.975Cu2Si2 (Ce 0.975) shows a static magnetic ordering at ambient P. With increasing P which enhances the Kondo temperature, the fraction of the A phase becomes markedly suppressed, and the SC fraction increases correspondingly, although Tc stays nearly constant in the measured pressure range, P ≤ 14.4 kbar. This shows that the P-induced transition from the A to the SC phases is of a first-order type, without passing through a quantum (T → 0) phase transition. However, no superconductivity has been attained in Ce 0.975 up to 19.4 kbar. It is considered that the P-induced superconductivity is sensitive to the sample quality.

Original languageEnglish
Pages (from-to)193-204
Number of pages12
JournalHyperfine Interactions
Volume128
Issue number1-3
DOIs
Publication statusPublished - 2000
Externally publishedYes

Fingerprint

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

Keywords

  • CeCuSi
  • NQR
  • Pressure

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Nuclear and High Energy Physics

Cite this

Ishida, K., Kawasaki, Y., Mito, T., Thessieu, C., Zheng, G-Q., Kitaoka, Y., ... Steglich, F. (2000). Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 under pressure. Hyperfine Interactions, 128(1-3), 193-204. https://doi.org/10.1023/A:1012635716291

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

In: Hyperfine Interactions, Vol. 128, No. 1-3, 2000, p. 193-204.

Research output: Contribution to journalArticle

Ishida, K, Kawasaki, Y, Mito, T, Thessieu, C, Zheng, G-Q, Kitaoka, Y, Geibel, C & Steglich, F 2000, 'Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 under pressure', Hyperfine Interactions, vol. 128, no. 1-3, pp. 193-204. https://doi.org/10.1023/A:1012635716291
Ishida, K. ; Kawasaki, Y. ; Mito, T. ; Thessieu, C. ; Zheng, Guo-Qing ; Kitaoka, Y. ; Geibel, C. ; Steglich, F. / Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 under pressure. In: Hyperfine Interactions. 2000 ; Vol. 128, No. 1-3. pp. 193-204.
@article{da7e7435c5ec44449b272d6659bd41e0,
title = "Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 under pressure",
abstract = "In order to investigate magnetic properties in the vicinity of the magnetic to superconducting (SC) phase boundary, we have performed Cu-NQR measurements under hydrostatic pressure (P) on two off-stoichiometric Ce1+xCu2+ySi2polycrystals: Ce0.99Cu2.02Si2 (denoted as Ce 0.99) exhibits the anomalous ground state so-called A phase dominated by critical magnetic correlations and Ce0.975Cu2Si2 (Ce 0.975) shows a static magnetic ordering at ambient P. With increasing P which enhances the Kondo temperature, the fraction of the A phase becomes markedly suppressed, and the SC fraction increases correspondingly, although Tc stays nearly constant in the measured pressure range, P ≤ 14.4 kbar. This shows that the P-induced transition from the A to the SC phases is of a first-order type, without passing through a quantum (T → 0) phase transition. However, no superconductivity has been attained in Ce 0.975 up to 19.4 kbar. It is considered that the P-induced superconductivity is sensitive to the sample quality.",
keywords = "CeCuSi, NQR, Pressure",
author = "K. Ishida and Y. Kawasaki and T. Mito and C. Thessieu and Guo-Qing Zheng and Y. Kitaoka and C. Geibel and F. Steglich",
year = "2000",
doi = "10.1023/A:1012635716291",
language = "English",
volume = "128",
pages = "193--204",
journal = "Hyperfine Interaction",
issn = "0304-3843",
publisher = "Springer Netherlands",
number = "1-3",

}

TY - JOUR

T1 - Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 under pressure

AU - Ishida, K.

AU - Kawasaki, Y.

AU - Mito, T.

AU - Thessieu, C.

AU - Zheng, Guo-Qing

AU - Kitaoka, Y.

AU - Geibel, C.

AU - Steglich, F.

PY - 2000

Y1 - 2000

N2 - In order to investigate magnetic properties in the vicinity of the magnetic to superconducting (SC) phase boundary, we have performed Cu-NQR measurements under hydrostatic pressure (P) on two off-stoichiometric Ce1+xCu2+ySi2polycrystals: Ce0.99Cu2.02Si2 (denoted as Ce 0.99) exhibits the anomalous ground state so-called A phase dominated by critical magnetic correlations and Ce0.975Cu2Si2 (Ce 0.975) shows a static magnetic ordering at ambient P. With increasing P which enhances the Kondo temperature, the fraction of the A phase becomes markedly suppressed, and the SC fraction increases correspondingly, although Tc stays nearly constant in the measured pressure range, P ≤ 14.4 kbar. This shows that the P-induced transition from the A to the SC phases is of a first-order type, without passing through a quantum (T → 0) phase transition. However, no superconductivity has been attained in Ce 0.975 up to 19.4 kbar. It is considered that the P-induced superconductivity is sensitive to the sample quality.

AB - In order to investigate magnetic properties in the vicinity of the magnetic to superconducting (SC) phase boundary, we have performed Cu-NQR measurements under hydrostatic pressure (P) on two off-stoichiometric Ce1+xCu2+ySi2polycrystals: Ce0.99Cu2.02Si2 (denoted as Ce 0.99) exhibits the anomalous ground state so-called A phase dominated by critical magnetic correlations and Ce0.975Cu2Si2 (Ce 0.975) shows a static magnetic ordering at ambient P. With increasing P which enhances the Kondo temperature, the fraction of the A phase becomes markedly suppressed, and the SC fraction increases correspondingly, although Tc stays nearly constant in the measured pressure range, P ≤ 14.4 kbar. This shows that the P-induced transition from the A to the SC phases is of a first-order type, without passing through a quantum (T → 0) phase transition. However, no superconductivity has been attained in Ce 0.975 up to 19.4 kbar. It is considered that the P-induced superconductivity is sensitive to the sample quality.

KW - CeCuSi

KW - NQR

KW - Pressure

UR - http://www.scopus.com/inward/record.url?scp=0034453069&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034453069&partnerID=8YFLogxK

U2 - 10.1023/A:1012635716291

DO - 10.1023/A:1012635716291

M3 - Article

AN - SCOPUS:0034453069

VL - 128

SP - 193

EP - 204

JO - Hyperfine Interaction

JF - Hyperfine Interaction

SN - 0304-3843

IS - 1-3

ER -