Ni-substituted sites and the effect on Cu electron spin dynamics of (formula presented)

Y. Itoh, S. Adachi, T. Machi, Yoji Ohashi, N. Koshizuka

Research output: Contribution to journalArticle

Abstract

We report a Cu nuclear quadrupole resonance experiment on magnetic impurity Ni-substituted (formula presented) The distribution of Ni-substituted sites and its effect on the Cu electron spin dynamics are investigated. Two samples with the same Ni concentration (formula presented) and nearly the same oxygen content but different (formula presented) ‘s were prepared: One is an as-synthesized sample (formula presented) in an oxygen gas (formula presented) and the other is a quenched one (formula presented) in a reduced oxygen atmosphere (formula presented) The plane-site (formula presented) nuclear spin-lattice relaxation for the quenched sample was faster than that for the as-synthesized sample, in contrast to the (formula presented) relaxation that was faster for the as-synthesized sample. This indicates that the density of plane-site Ni(2) is higher in the quenched sample, contrary to the chain-site Ni(1) density, which is lower in the quenched sample. From the analysis in terms of the Ni-induced nuclear spin-lattice relaxation, we suggest that the primary origin of suppression of (formula presented) is associated with the nonmagnetic depairing effect of the plane-site Ni(2).

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number13
DOIs
Publication statusPublished - 2002 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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