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Bulletin of Materials Science

, Volume 14, Issue 3, pp 619–623 | Cite as

NMR studies of Nd2−x Ce x CuO4

  • S M Doyle
  • R Dupree
  • A P Howes
  • D McK Paul
  • M E Smith
International Conference On Superconductivity—II
  • 23 Downloads

Abstract

Copper NMR has been studied as a function of temperature in a number of superconducting Nd2−x Ce x CuO4 samples. The electric field gradient is very small and the Knight shift is 2380 ppm at room temperature, both of these implying that the copper is in a Cu+ state. The Knight shift decreases with temperature particularly belowT c . The spin contribution to the Knight shift is estimated to be ∼ 200 ppm (about a factor ten smaller than in YBa2Cu3O7) indicating thatN s (E F ) at the copper sites is small in this material.

Keywords

NMR Nd-Ce-CuO4 Knight shift 

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Copyright information

© Indian Academy of Sciences 1991

Authors and Affiliations

  • S M Doyle
    • 1
  • R Dupree
    • 1
  • A P Howes
    • 1
  • D McK Paul
    • 1
  • M E Smith
    • 1
    • 2
  1. 1.Physics DepartmentUniversity of WarwickCoventryU.K.
  2. 2.Bruker Analytische Messtechnik GmbH, SilbersteifenRheinstetten 4W. Germany

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