Microwave response of YBa2Cu3O7−xgrain boundary junction

Autor:	Sungjoon Bae, Youngjong Lee, Joong-Shik Shin, Kwangsoo No, John S. Chun, Doo-Sup Hwang, Changhyun Cho, Seungbum Hong, Young Keun Kim
Rok vydání:	1995
Předmět:	Superconductivity Materials science Condensed matter physics Analytical chemistry General Physics and Astronomy Grain boundary Irradiation Chemical vapor deposition Thin film Ion milling machine Single crystal Microwave
Zdroj:	Journal of Applied Physics. 77:2193-2195
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.358799
Popis:	YBa2Cu3O7−x superconductor thin films were deposited on LaAlO3(100) single crystal substrates using a metalorganic chemical vapor deposition method. These films showed a critical temperature of about 90 K and a critical current density of over 105 A/cm2 at 77 K. These films showed granular structure with 0.5–1.5 μm grains. Bridge‐type junctions, 6 μm in width and 6 μm in length, were fabricated using photolithography and Ar ion milling techniques. Current‐voltage (I‐V) characteristics of these junctions with microwave irradiation at 77 K were studied. The critical current densities decreased as the irradiated microwave power increased. When microwaves are irradiated on the bridge at 77 K, the I‐V characteristics showed constant voltage steps (Shapiro steps) at ΔV=nhν/2e, but subharmonic steps.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::07cea20eaf18211a6e940955ebf007de https://doi.org/10.1063/1.358799 Zobrazit plný text záznamu