Study of the submillimeter absorptivity of high T sub c superconductors by photothermal interference spectroscopy

Journal Article · Mon Dec 23 00:00:00 EST 1991 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.105658· OSTI ID:5526742

Mueller, M; Basun, S; Glaser, S; Renk, K F ^[1]

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1. Institut fuer Angewandte Physik, Universitaet Regensburg, 8400 Regensburg (Germany)

We report on the study of the submillimeter absorptivity of high-{ital T}{sub {ital c}} superconductors by a new method, the photothermal interference spectroscopy. Absorption in a sample leads to a temperature change of the sample and, by heat transfer, also of a gas volume adjacent to the sample and to a change of refractive index in the gas volume that we detect by an interferometric method. We demonstrate the feasibility of the method by determination of the absorptivity of high-{ital T}{sub {ital c}} superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} samples for submillimeter radiation at a frequency near 1 THz. The absorptivity shows a peak at {ital T}{sub {ital c}}, that is most likely due to fluctuation effects, a strong drop below {ital T}{sub {ital c}} and a finite value at low temperatures, with a peak near 15 K.

• OSTI ID: 5526742
• Journal Information: Applied Physics Letters; (United States), Vol. 59:26; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
RADIATION ABSORPTION ANALYSIS
CUPRATES
MEASURING METHODS
YTTRIUM OXIDES
FAR INFRARED RADIATION
HIGH-TC SUPERCONDUCTORS
QUATERNARY COMPOUNDS
TEMPERATURE DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL ANALYSIS
COPPER COMPOUNDS
ELECTROMAGNETIC RADIATION
INFRARED RADIATION
NONDESTRUCTIVE ANALYSIS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties