Far-infrared absorption by bulk high- T sub c superconductors using an optically pumped CH sub 3 OH laser

Journal Article · Sat Jun 01 00:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.12976· OSTI ID:5490761

Kawate, E; Onae, A ^[1]; Isida, K ^[2]; Tamegai, T ^[3]; Miki, Y; Okaji, M ^[1]

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1. National Research Laboratory of Metrology, 1-4, Umezono 1-Chome, Tsukuba, Ibaraki 305, Japan (JP)
2. Faculty of Science and Technology, Science University of Tokyo, 2641 Yamazaki, Noda, Chiba 278, Japan (JP)
3. Institute for Solid State Physics, The University of Tokyo, 22-1, Roppongi 7-Chome, Minato-ku, Tokyo 106, Japan (JP)

We have developed a far-infrared-absorption-measurement method using an optically pumped far-infrared laser. The temperature dependence of the light absorption by high-{ital T}{sub {ital c}} superconductors has been investigated for the photon energy between 7.6 and 17.6 meV in the temperature region between 12 and 160 K. A well-defined transition temperature was obtained from the absorption measurement. With decreasing temperature, the absorption decreased, but did not reach zero even at sufficiently low temperatures.

• OSTI ID: 5490761
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 43:16; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HIGH-TC SUPERCONDUCTORS
ABSORPTION SPECTRA
FAR INFRARED RADIATION
LASERS
LOW TEMPERATURE
MEASURING METHODS
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ELECTROMAGNETIC RADIATION
INFRARED RADIATION
PHYSICAL PROPERTIES
RADIATIONS
SPECTRA
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
360204* - Ceramics
Cermets
& Refractories- Physical Properties