Infrared studies of textured ceramic high-Tc superconductors

D. B. Tanner, T. Timusk, S. L. Herr, K. Kamarás, C. D. Porter, D. A. Bonn, J. D. Garrett, C. V. Stager, J. E. Greedan, M. Reedyk

Research output: Contribution to journalArticle

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Abstract

The surfaces of ceramic samples of high-temperature superconductors can have a high degree of crystalline orientation, depending of the way in which they are prepared. (In particular it is essential that the sample not be polished in an attempt to "improve" the optical quality.) The surfaces of these textured ceramic samples consist of small crystallites, with about 80% orientation of the crystallographic c axis normal to the surface. The infrared and optical properties of these samples have been measured. We observe that the frequency-dependent conductivity can be decomposed into the sum of a far-infrared Drude part (which at zero frequency equals the ordinary dc conductivity) and a broad, temperature-independent mid-infrared band. The mid-infrared band has about four times the oscillator strength of the low-frequency Drude part.

Original languageEnglish
Pages (from-to)214-219
Number of pages6
JournalPhysica A: Statistical Mechanics and its Applications
Volume157
Issue number1
DOIs
Publication statusPublished - May 1 1989

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High-Tc Superconductors
Infrared
ceramics
Mid-infrared
Conductivity
High-temperature Superconductors
conductivity
high temperature superconductors
oscillator strengths
Optical Properties
crystallites
Low Frequency
low frequencies
optical properties
Dependent
Zero
temperature

ASJC Scopus subject areas

  • Mathematical Physics
  • Statistical and Nonlinear Physics

Cite this

Infrared studies of textured ceramic high-Tc superconductors. / Tanner, D. B.; Timusk, T.; Herr, S. L.; Kamarás, K.; Porter, C. D.; Bonn, D. A.; Garrett, J. D.; Stager, C. V.; Greedan, J. E.; Reedyk, M.

In: Physica A: Statistical Mechanics and its Applications, Vol. 157, No. 1, 01.05.1989, p. 214-219.

Research output: Contribution to journalArticle

Tanner, DB, Timusk, T, Herr, SL, Kamarás, K, Porter, CD, Bonn, DA, Garrett, JD, Stager, CV, Greedan, JE & Reedyk, M 1989, 'Infrared studies of textured ceramic high-Tc superconductors', Physica A: Statistical Mechanics and its Applications, vol. 157, no. 1, pp. 214-219. https://doi.org/10.1016/0378-4371(89)90304-X
Tanner, D. B. ; Timusk, T. ; Herr, S. L. ; Kamarás, K. ; Porter, C. D. ; Bonn, D. A. ; Garrett, J. D. ; Stager, C. V. ; Greedan, J. E. ; Reedyk, M. / Infrared studies of textured ceramic high-Tc superconductors. In: Physica A: Statistical Mechanics and its Applications. 1989 ; Vol. 157, No. 1. pp. 214-219.
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