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Journal of Low Temperature Physics

, Volume 105, Issue 3–4, pp 371–376 | Cite as

63Cu NMR in the normal state of HgBa2Ca2Cu3O8+δ

  • M. -H. Julien
  • M. Horvatić
  • C. Berthier
  • P. Ségransan
Spin Dynamics

Abstract

We present a63Cu NMR study of HgBa2Ca2Cu3O8+δ underdoped single crystals with Tc ≃ 115 K. While the uniform spin susceptibility decreases below To ≃ 370 K, relaxation rate measurements demonstrate the opening of a spingap at Q = (π, π) below T* ≃ 230 K, the highest temperature reported so far. The characteristic energy of spin fluctuations is shown to be higher than in underdoped YBa2Cu3O7−δ, and the analysis of the quadrupole and hyperfine couplings suggests that the in-plane Cu-O hybridization is also stronger. The T-dependence of T1 is the same in the three CuO2 planes which seems hardly compatible with the pure interlayer spin-pairing picture.

PACS numbers

74.25.Nf 74.12.Jt 76.60.−k 

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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • M. -H. Julien
    • 1
  • M. Horvatić
    • 1
  • C. Berthier
    • 1
  • P. Ségransan
    • 1
    • 2
  1. 1.Grenoble High Magnetic Field LaboratoryMPI-FKF and CNRSGrenoble CedexFrance
  2. 2.Laboratoire de Spectrométrie PhysiqueUniversité Joseph Fourier and CNRSSaint Martin d'Hères CedexFrance

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