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

Journal Article · Mon Dec 23 04:00:00 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), Journal Name: Applied Physics Letters; (United States) Vol. 59:26; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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