Ac-dc conversion effect in Y-Ba-Cu-O ceramics

Journal Article · Sat Apr 01 04:00:00 EST 1989 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.342769· OSTI ID:6228987

Ikegawa, S; Honda, T; Ikeda, H; Maeda, A; Uchida, S; Uchinokura, K; Tanaka, S

In Y-Ba-Cu-O ceramics, the dc voltage (V/sub dc/ ) induced by an rf current of 2--20 MHz, which had been previously reported as ''reverse ac Josephson effect,'' was observed at 77--300 K. The observed V/sub dc/ is not found to be due to reverse ac Josephson effect but due to nonlinear current-voltage characteristics, as in the case of BaPb/sub 1-//sub x/Bi/sub x/O/sub 3/. However, behavior of the V/sub dc/ is different from that in BaPb/sub 1-//sub x/Bi/sub x/O/sub 3/, which was related to bulk superconducting transition. The V/sub dc/ is observed only in the sample with particular electrical contacts and only when the rf current can flow through the potential electrical contacts. The origin of the rf-to-dc conversion effect in Y-Ba-Cu-O is ascribed to local nonlinear resistance near potential contacts.

• Research Organization: Department of Applied Physics, the University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan
• OSTI ID: 6228987
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 65:7; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LOW TEMPERATURE
MEDIUM TEMPERATURE
NONLINEAR PROBLEMS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES