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Coexisting static magnetic order and superconductivity in CeCu2Si2 found by nuclear quadrupole resonance

Cheng Tien

  • Department of Physics, National Cheng Kung University, Tainan, Taiwan, Republic of China

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Phys. Rev. B 43, 83 – Published 1 January, 1991Erratum Phys. Rev. B 44, 2430 (1991)

DOI: https://doi.org/10.1103/PhysRevB.43.83

Abstract

Cu63 nuclear quadrupole resonance (NQR) has been observed in a heavy-fermion system CeCu2Si2. In the superconducting CeCu2Si2 specimens (Tc≃0.6 K), NQR experiments have revealed an onset of a phase transition below ∼1 K. Zero- and longitudinal-field muon-spin-relaxation measurements suggest a static magnetic ordering below ∼0.8 K, either in the spin-glass or in incommensurate spin-density-wave states. The exotic transition observed in NQR measurements should be closely related to the static magnetic ordering in muon-spin-relaxation measurements. NQR data from a nonsuperconducting CeCu2Si2 sample are consistent with extensive disorder in Cu site occupation. Therefore, the spin-density wave may be depressed in the nonsuperconducting CeCu2Si2. The superconducting transition temperature Tc can be enhanced by the presence of spin-density waves such that, if the spin-density wave is depressed, CeCu2Si2 will lose its superconducting properties.

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Erratum

Erratum: Coexisting static magnetic order and superconductivity in CeCu2Si2 found by nuclear quadrupole resonance

Cheng Tien
Phys. Rev. B 44, 2430 (1991)

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Phys. Rev. B 43, 83– Published 1 January, 1991
  • Received 17 August 1990

© 1991 American Physical Society

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