We present an empirical summary of the far-infrared reflectivity of 18 samples of Ba2YCu3Ox, with emphasis on 10 microtwinned crystals with x nominally near 7. The results vary among samples, indicating that further oriented, necessary to identify the intrinsic behavior to our satisfaction. At this stage the general behavior allows work will be a constant relaxation rate for charge carriers and to make only general remarks concerning the us to rule out superconducting energy gap.
© 1989 Optical Society of America
Original Manuscript: September 28, 1988
Manuscript Accepted: November 7, 1988
Published: March 1, 1989
G. A. Thomas, M. Capizzi, T. Timusk, S. L. Cooper, J. Orenstein, D. Rapkine, S. Martin, L. F. Schneemeyer, and J. V. Waszczak, "Variations in the far-infrared reflectivity of Ba2YCu3Ox," J. Opt. Soc. Am. B 6, 415-419 (1989)