Anomalous Temperature Dependence of the Electric Field Gradient at the Y Site in In₀.₁Y₀.₉Ba₂Cu₃O_{9- δ}

Alternative Title

Evidence for soft vibrational modes

Author

Gary L. Catchen
Michael Blaszkiewicz
Anthony Baratta
Wayne Huebner, Missouri University of Science and TechnologyFollow

Abstract

Perturbed angular correlation (PAC) spectroscopy has been used to measure a well-defined static electric quadrupole interaction in a superconducting ceramic, In_0.1Y_0.9Ba₂Cu₃O_9-δ. Perturbation functions, Fourier transforms, and the derived PAC parameters are given for data taken at temperatures ranging from 77 to 1070 K. Indirect evidence is presented for the occupation of the Y site by the ¹¹¹In-¹¹¹Cd PAC probe. The derived electric field gradients were found to increase linearly with temperature. This result suggests the presence of soft, anisotropic vibrations in the structure. Additional evidence is presented to indicate that O^2--ion or O-vacancy transport may not occur in the Y coordination sphere.

Recommended Citation

G. L. Catchen et al., "Anomalous Temperature Dependence of the Electric Field Gradient at the Y Site in In₀.₁Y₀.₉Ba₂Cu₃O_{9- δ}," Physical Review B, American Physical Society (APS), Aug 1988.

The definitive version is available at https://doi.org/10.1103/PhysRevB.38.2824

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

2469-9950

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1988 American Physical Society (APS), All rights reserved.

Publication Date

01 Aug 1988