Focused ion beam highTcsuperconductor dc SQUIDs

Autor:	R. A. Davidheiser, M. J. Zani, J.A. Luine, R.W. Simon
Rok vydání:	1991
Předmět:	Superconductivity High-temperature superconductivity Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Focused ion beam law.invention SQUID law Condensed Matter::Superconductivity Thin film Electric current Current density Microwave
Zdroj:	Applied Physics Letters. 59:234-236
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.105976
Popis:	Light‐ion irradiation can controllably reduce the critical current density of high‐temperature superconductor thin films. Reported here is the behavior of ErBa2Cu3O7 films patterned into microbridge dc superconducting quantum interference device (SQUID) structures and irradiated with a rastered high‐energy focused ion beam of 70 nm diameter. The resultant SQUIDs have demonstrated up to 51% critical current modulation at 46 K. Microbridges with appropriate critical currents manifest Josephson‐like behavior in the form of well‐defined Shapiro steps appearing with microwave radiation. The IcRn products of these microbridges are typically a few millivolts and the temperature dependence of their normal‐state resistance is consistent with conduction through metallic filaments.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::131f31c72f0cbccfd80ad0cb00d3c307 https://doi.org/10.1063/1.105976 Zobrazit plný text záznamu