Superconducting thin-film flux transformers of YBa2Cu3O7−x
- 29 October 1990
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 57 (18) , 1930-1932
- https://doi.org/10.1063/1.104015
Abstract
Using a three‐layer YBa2Cu3O7−x‐SrTiO3‐YBa2Cu3O7−x in situ laser deposition process, we have constructed thin‐film flux transformers which have pickup loops 10 mm on a side and input coils with ten turns. Each layer was patterned with a shadow mask or photolithography. The flux transformers were inductively coupled to a dc superconducting quantum interference device (SQUID) at 4.2 K to determine their transition temperature, and the temperature dependence of their critical current and coupling efficiency. The best flux transformer had a transition temperature of 77 K, and enhanced the magnetic field response of the SQUID by a factor of 9.5.Keywords
This publication has 10 references indexed in Scilit:
- YBaCuO input coils with low T c and high T c SQUIDsApplied Physics Letters, 1990
- Superconducting thin-film multiturn coils of YBa2Cu3O7−xApplied Physics Letters, 1990
- Multilayer YBa2Cu3Ox-SrTiO3-YBa2Cu3Ox films for insulating crossoversApplied Physics Letters, 1990
- Low-noise thin-film TlBaCaCuO dc SQUIDs operated at 77 KApplied Physics Letters, 1989
- Magnetic flux noise in thin-film rings of YBa2Cu3O7−δApplied Physics Letters, 1988
- Preparation of thin-film YBaCuO quantum interference devices with a lift-off techniqueApplied Physics Letters, 1988
- DC-SQUID with High-Critical-Temperature Oxide-Superconductor FilmJapanese Journal of Applied Physics, 1987
- Quantum interference devices made from superconducting oxide thin filmsApplied Physics Letters, 1987
- Ultra-low-noise tunnel junction dc SQUID with a tightly coupled planar input coilApplied Physics Letters, 1982
- Miniature Ultrasensitive Superconducting Magnetic Gradiometer and Its Use in Cardiography and Other ApplicationsApplied Physics Letters, 1971