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

doi:10.1016/S0921-4526(99)01172-2

Cu-NQR study of magnetism and superconductivity in Ce_1+xCu_2+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 journal › Conference article › peer-review

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 Ce_1+xCu_2+ySi₂. Ce_0.99Cu_2.02Si₂ 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 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_0.975Cu₂Si₂ 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.

Original language	English
Pages (from-to)	14-15
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	281-282
DOIs	https://doi.org/10.1016/S0921-4526(99)01172-2
Publication status	Published - 2000
Externally published	Yes
Event	Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) - Nagano, Japan Duration: Aug 24 1999 → Aug 28 1999

Keywords

CeCuSi
NQR
Pressure

ASJC Scopus subject areas

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

Access to Document

10.1016/S0921-4526(99)01172-2

Cite this

@article{48e0d1aaa5b64f048b56b34d3f17c4ce,

title = "Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 underpressure",

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.",

keywords = "CeCuSi, NQR, Pressure",

author = "Y. Kawasaki and K. Ishida and T. Mito and C. Thessieu and Zheng, {G. Q.} and Y. Kitaoka and K. Asayama and C. Geibel and F. Steglich",

note = "Funding Information: This work was supported by the COE Research (10CE2004) in Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan.; Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) ; Conference date: 24-08-1999 Through 28-08-1999",

year = "2000",

doi = "10.1016/S0921-4526(99)01172-2",

language = "English",

volume = "281-282",

pages = "14--15",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

}

TY - JOUR

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

AU - Kawasaki, Y.

AU - Ishida, K.

AU - Mito, T.

AU - Thessieu, C.

AU - Zheng, G. Q.

AU - Kitaoka, Y.

AU - Asayama, K.

AU - Geibel, C.

AU - Steglich, F.

N1 - Funding Information: This work was supported by the COE Research (10CE2004) in Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan.

PY - 2000

Y1 - 2000

N2 - 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.

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.

KW - CeCuSi

KW - NQR

KW - Pressure

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U2 - 10.1016/S0921-4526(99)01172-2

DO - 10.1016/S0921-4526(99)01172-2

M3 - Conference article

AN - SCOPUS:0033902140

SN - 0921-4526

VL - 281-282

SP - 14

EP - 15

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99)

Y2 - 24 August 1999 through 28 August 1999

ER -