Quenching of magnetic fluctuations around 119Sn impurities in superconducting GdBa2(Cu0.99Sn0.01)3O7

M. Pasternak*, R. D. Taylor

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Mössbauer Spectroscopy studies with 119Sn substituted for Cu in GdBa2(Cu0.99Sn0.01)3O7 (Tc = 90 K) reveal the occurrence of a transferred hyperfine interaction at temperatures below 60 K. The effective magnetic field is 8.3 KOe at 57 K and decreases gradually with decreasing temperature to 6 KOeat 16 K. The onset of the magnetic interaction at the non-paramagnetic 119Sn probe is explained in terms of local depletion of holes due to the Sn4+ doping, consequently quenching the magnetic fluctuations around the impurity. These experimental findings provide strong evidence for spin-spin correlations originating from the Cu2+ moments and present in the superconducting state.

Original languageEnglish
Pages (from-to)1157-1159
Number of pages3
JournalSolid State Communications
Volume69
Issue number12
DOIs
StatePublished - Mar 1989

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