Josephson effects at 77 K in grain boundary bridge made of thick films

Using the screen printing method, YBaCuO high T c superconducting films were fabricated. The thickness of the films was ≃30 µm and maximum grain size was ≃70 µm. T czero =90.7 K and J c =20 A/cm 2 at 77 K were obtained. With a razor edge, the films were cut and formed to grain boundary bridges havin...

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Veröffentlicht in:	Japanese Journal of Applied Physics 1988-06, Vol.27 (6), p.L1107-L1109
Hauptverfasser:	YAMASHITA, T, KAWAKAMI, A, NOGE, S, XU, W, TAKADA, M, KOMATSU, T, MATUSITA, K
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Physics Proximity effects, weak links, tunneling phenomena, and josephson effects, adreev effect, sn and sns junctions Superconductivity
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Beschreibung
Zusammenfassung:	Using the screen printing method, YBaCuO high T c superconducting films were fabricated. The thickness of the films was ≃30 µm and maximum grain size was ≃70 µm. T czero =90.7 K and J c =20 A/cm 2 at 77 K were obtained. With a razor edge, the films were cut and formed to grain boundary bridges having a few grain boundaries in the bridge region. The devices showed clear Shapiro steps and SQUID patterns at 77 K.
ISSN:	0021-4922 1347-4065
DOI:	10.1143/jjap.27.l1107