Pressure-induced anomalous magnetism and unconventional superconductivity in (formula presented) (formula presented)-NQR study under pressure

Y. Kawasaki, Y. Onuki, Guo-Qing Zheng, K. Ishida, Y. Kitaoka, Shinji Kawasaki, T. Mito, D. Aoki, Y. Haga

Research output: Contribution to journalArticle

Abstract

We report (formula presented) nuclear-quadrupole-resonance (NQR) measurements of the pressure (formula presented)-induced superconductor (formula presented) in the antiferromagnetic (AF) and superconducting (SC) states. In the AF region, the internal field (formula presented) at the In site is substantially reduced from (formula presented) at (formula presented) to 0.39 kOe at (formula presented) while the Néel temperature slightly changes with increasing P. This suggests that either the size in the ordered moment (formula presented) or the angle (formula presented) between the direction of (formula presented) and the tetragonal c axis is extrapolated to zero at (formula presented) at which a bulk SC transition is no longer emergent. In the SC state at (formula presented) the nuclear spin-lattice relaxation rate (formula presented) has revealed a (formula presented) dependence without the coherence peak just below (formula presented) giving evidence for the unconventional superconductivity. The dimensionality of the magnetic fluctuations in the normal state is also discussed.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number22
DOIs
Publication statusPublished - Jan 1 2001
Externally publishedYes

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Nuclear quadrupole resonance
nuclear quadrupole resonance
Spin-lattice relaxation
Magnetism
Superconductivity
Superconducting materials
superconductivity
Temperature
Direction compound

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Pressure-induced anomalous magnetism and unconventional superconductivity in (formula presented) (formula presented)-NQR study under pressure. / Kawasaki, Y.; Onuki, Y.; Zheng, Guo-Qing; Ishida, K.; Kitaoka, Y.; Kawasaki, Shinji; Mito, T.; Aoki, D.; Haga, Y.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 63, No. 22, 01.01.2001.

Research output: Contribution to journalArticle

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abstract = "We report (formula presented) nuclear-quadrupole-resonance (NQR) measurements of the pressure (formula presented)-induced superconductor (formula presented) in the antiferromagnetic (AF) and superconducting (SC) states. In the AF region, the internal field (formula presented) at the In site is substantially reduced from (formula presented) at (formula presented) to 0.39 kOe at (formula presented) while the N{\'e}el temperature slightly changes with increasing P. This suggests that either the size in the ordered moment (formula presented) or the angle (formula presented) between the direction of (formula presented) and the tetragonal c axis is extrapolated to zero at (formula presented) at which a bulk SC transition is no longer emergent. In the SC state at (formula presented) the nuclear spin-lattice relaxation rate (formula presented) has revealed a (formula presented) dependence without the coherence peak just below (formula presented) giving evidence for the unconventional superconductivity. The dimensionality of the magnetic fluctuations in the normal state is also discussed.",
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AU - Kawasaki, Y.

AU - Onuki, Y.

AU - Zheng, Guo-Qing

AU - Ishida, K.

AU - Kitaoka, Y.

AU - Kawasaki, Shinji

AU - Mito, T.

AU - Aoki, D.

AU - Haga, Y.

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N2 - We report (formula presented) nuclear-quadrupole-resonance (NQR) measurements of the pressure (formula presented)-induced superconductor (formula presented) in the antiferromagnetic (AF) and superconducting (SC) states. In the AF region, the internal field (formula presented) at the In site is substantially reduced from (formula presented) at (formula presented) to 0.39 kOe at (formula presented) while the Néel temperature slightly changes with increasing P. This suggests that either the size in the ordered moment (formula presented) or the angle (formula presented) between the direction of (formula presented) and the tetragonal c axis is extrapolated to zero at (formula presented) at which a bulk SC transition is no longer emergent. In the SC state at (formula presented) the nuclear spin-lattice relaxation rate (formula presented) has revealed a (formula presented) dependence without the coherence peak just below (formula presented) giving evidence for the unconventional superconductivity. The dimensionality of the magnetic fluctuations in the normal state is also discussed.

AB - We report (formula presented) nuclear-quadrupole-resonance (NQR) measurements of the pressure (formula presented)-induced superconductor (formula presented) in the antiferromagnetic (AF) and superconducting (SC) states. In the AF region, the internal field (formula presented) at the In site is substantially reduced from (formula presented) at (formula presented) to 0.39 kOe at (formula presented) while the Néel temperature slightly changes with increasing P. This suggests that either the size in the ordered moment (formula presented) or the angle (formula presented) between the direction of (formula presented) and the tetragonal c axis is extrapolated to zero at (formula presented) at which a bulk SC transition is no longer emergent. In the SC state at (formula presented) the nuclear spin-lattice relaxation rate (formula presented) has revealed a (formula presented) dependence without the coherence peak just below (formula presented) giving evidence for the unconventional superconductivity. The dimensionality of the magnetic fluctuations in the normal state is also discussed.

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