Electrical response of Ba sub 1 minus x K sub x BiO sub 3 polycrystalline thin films to infrared radiation

Journal Article · Mon Dec 17 04:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.104195· OSTI ID:6116194

Tanabe, K; Enomoto, Y; Yamaji, A ^[1]

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1. NTT Applied Electronics Laboratories, Tokai, Ibaraki 319-11 (Japan)

The electrical response to infrared radiation of polycrystalline Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} thin films on MgO(100) and sapphire substrates with {ital T}{sub {ital c}}'s of approximately 20 K is studied using modulated laser light at a wavelength of 1.3 {mu}m. These films clearly show nonbolometric responses which are quite similar to those observed in BaPb{sub 1{minus}{ital x}}Bi{sub {ital x}}O{sub 3} optical detectors based on nonequilibrium superconductivity. The responsivity values at about 15 K are one or two orders of magnitude larger than those for the copper-oxide-based high {ital T}{sub {ital c}} superconductors with much larger electronic density of states at the Fermi level. These results indicate that Ba{sub 1{minus}{ital x}}{ital M}{sub {ital x}}BiO{sub 3}({ital M}=K,Rb) is a promising candidate for a sensitive nonequilibrium infrared detector which can be operated using a closed-cycle refrigerator.

• OSTI ID: 6116194
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 57:25; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CHALCOGENIDES
CORUNDUM
CRYSTALS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY-LEVEL DENSITY
EXPERIMENTAL DATA
FERMI LEVEL
FILMS
HIGH-TC SUPERCONDUCTORS
INFORMATION
INFRARED RADIATION
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MINERALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHOTOELECTRIC EFFECT
PHOTOELECTROMAGNETIC EFFECTS
PHYSICAL PROPERTIES
POLYCRYSTALS
POTASSIUM COMPOUNDS
POTASSIUM OXIDES
RADIATIONS
SAPPHIRE
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THIN FILMS
VERY LOW TEMPERATURE