ESR determination of the local spin susceptibility in high-temperature superconductors

A. Jànossy, L. Brunel

Research output: Contribution to journalArticle

20 Citations (Scopus)


(Formula presented) ESR at high fields in Gd-doped high-(Formula presented) superconductors is shown to be a precise probe of the conduction electron static spin susceptibility, χ. The (Formula presented) ESR Knight shift at 245 GHz and the spin relaxation broadening at 245 and 9.2 GHz in (Formula presented)(Formula presented)(Formula presented)(Formula presented)(Formula presented) (with various values of y between 6.05 and 7.0) are in agreement with published (Formula presented) NMR data above 70 K and provide additional measurements at the rare earth site at much lower temperatures. In the superconducting compounds χ(T) differs strongly from the Yoshida function and at low T it follows a T or (Formula presented) dependence. An anomalous ESR line shape is found at low T in the superconducting state; we provisionally attribute this to a small ((Formula presented)-(Formula presented)) static magnetic moment on planar Cu sites.

Original languageEnglish
Pages (from-to)10186-10191
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number14
Publication statusPublished - Jan 1 1996

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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