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Shift of phonon anomaly with T sub c observed in (Y,Er)Ba sub 2 Cu sub 3 O sub 7 minus. delta. by ion channeling

Journal Article · · Physical Review (Section) B: Condensed Matter; (USA)
; ; ;  [1]
  1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (US)
Ion channeling and Rutherford backscattering (RBS) in small, high-quality single crystals of (Y,Er)Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} has previously shown an abrupt anomaly at {ital T}{sub {ital c}}in displacements perpendicular to the {ital c} axis of atoms in the (001) Cu-O rows. Here we report additional RBS-channeling results, and new characteristic x-ray measurements that permit more direct identification of the displacements of the individual atomic species in both materials. It is demonstrated that the observed phonon anomaly shifts directly with stoichiometry-induced changes in {ital T}{sub {ital c}}.
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
5117279
Journal Information:
Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:16; ISSN PRBMD; ISSN 0163-1829
Country of Publication:
United States
Language:
English