Hysteretic Josephson Junction Behavior of Ba1-xKxBiO3 Grain Boundary Junctions Using SrTiO3 Bicrystal Substrates

Autor:	Ken\\'ichi Kuroda, Yukihiko Wada, Kumi Terada, Kazuyoshi Kojima, Masahiro Nunoshita, Tetsuya Takami, Junji Tanimura, Masayuki Kataoka
Rok vydání:	1994
Předmět:	Superconductivity Pi Josephson junction Josephson effect Materials science Condensed matter physics Tunnel junction General Engineering General Physics and Astronomy Grain boundary Substrate (electronics) Voltage Magnetic field
Zdroj:	Japanese Journal of Applied Physics. 33:L1004
ISSN:	1347-4065 0021-4922
Popis:	We have fabricated Ba1- x K x BiO3 artificial grain boundary junctions with low resistance on a SrTiO3 bicrystal substrate. These junctions show hysteretic junction behavior with a clear superconducting energy gap structure and Josephson current. The area resistance was low; it ranged from 5.2×10-8 to 2.0×10-5 Ω ·cm2. The I c R n product of the 20-µm-wide junction was 3.5 mV at 4.2 K. The gap voltage increased as the heater temperature increased and reached about 8 mV. A weak magnetic field applied normal to the substrate induced a Fraunhofer-type pattern.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e8da4a14b58747aba5e9726e9af7ca66 https://doi.org/10.1143/jjap.33.l1004 Zobrazit plný text záznamu