Electric field sensitive moving hot spot in GdBa sub(2)Cu sub(3)O sub(7- delta ) ceramics

Electric field sensitive moving hot spot in GdBa sub(2)Cu sub(3)O sub(7- delta ) ceramics

An electric field sensitive moving hot spot appeared on a GdBa sub(2)Cu sub(3)O sub(7- delta ) bar with following dimension, 0.65 mm x 0.65 mm x 40 mm, when a dc voltage of 7 V was applied at room temperature. The spot moved to the negative electrode, and the direction of movement could be reversed...

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Veröffentlicht in:Japanese Journal of Applied Physics, Part 2: Letters Part 2: Letters, 1994-01, Vol.33 (9A), p.L1212-L1214
Hauptverfasser: Okamoto, Tomoichiro, Huybrechts, Ben, Takata, Masasuke
Format: Artikel
Sprache:eng
Schlagworte:
Crystal defects
Electric fields
Electric properties
Electrodes
Gadolinium compounds
Heating
Ionic conduction
Oxygen
Superconducting materials
Switching
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Zusammenfassung:An electric field sensitive moving hot spot appeared on a GdBa sub(2)Cu sub(3)O sub(7- delta ) bar with following dimension, 0.65 mm x 0.65 mm x 40 mm, when a dc voltage of 7 V was applied at room temperature. The spot moved to the negative electrode, and the direction of movement could be reversed time after time by switching the positive and negative electrode. The average velocity of the hot spot was 1.9 mm/min. The spot size increased with increasing voltage. This phenomenon is believed to be related to the ionic conduction by oxygen.
ISSN:0021-4922