Far-infrared ellipsometric signature of gap and of unknown high-temperature phase of  YbACuO

Karl-Ludwig Barth

doi:10.1117/12.2298126

14 December 1992 Far-infrared ellipsometric signature of gap and of unknown high-temperature phase of YbACuO

Karl-Ludwig Barth

Author Affiliations +

Proceedings Volume 1929, 17th International Conference on Infrared and Millimeter Waves; 192909 (1992) https://doi.org/10.1117/12.2298126
Event: 17th International Conference on Infrared and Millimeter Waves, 1992, Pasadena, CA, United States

Abstract

A far-infrared laser ellipsometer based on novel high-contrast polarizers is applied to YBaCuO ceramics. Temperature scans clearly reveal the gap, e.g. at 80 cm-' with 4% Fe. -Surprisingly a yet unreported material modification is observed between 110 and 190 K. It is sensitive to an external magnetic field of a few mT.

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Karl-Ludwig Barth "Far-infrared ellipsometric signature of gap and of unknown high-temperature phase of YbACuO", Proc. SPIE 1929, 17th International Conference on Infrared and Millimeter Waves, 192909 (14 December 1992); https://doi.org/10.1117/12.2298126

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