Active superconducting devices formed of thin films

Patent · Tue May 28 00:00:00 EDT 1991

OSTI ID:867840

Martens, Jon S ^[1]; Beyer, James B ^[1]; Nordman, James E ^[1]; Hohenwarter, Gert K. G. ^[1]

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1. Madison, WI

Active superconducting devices are formed of thin films of superconductor which include a main conduction channel which has an active weak link region. The weak link region is composed of an array of links of thin film superconductor spaced from one another by voids and selected in size and thickness such that magnetic flux can propagate across the weak link region when it is superconducting. Magnetic flux applied to the weak link region will propagate across the array of links causing localized loss of superconductivity in the links and changing the effective resistance across the links. The magnetic flux can be applied from a control line formed of a superconducting film deposited coplanar with the main conduction channel and weak link region on a substrate. The devices can be formed of any type to superconductor but are particularly well suited to the high temperature superconductors since the devices can be entirely formed from coplanar films with no overlying regions. The devices can be utilized for a variety of electrical components, including switching circuits, amplifiers, oscillators and modulators, and are well suited to microwave frequency applications.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• Assignee: Wisconsin Alumni Research Foundation (Madison, WI)
• Patent Number(s): US 5019721
• Application Number: 07/395,965
• OSTI ID: 867840
• Country of Publication: United States
• Language: English

Related Subjects

active
superconducting
devices
formed
films
superconductor
main
conduction
channel
weak
link
region
composed
array
links
film
spaced
voids
selected
size
thickness
magnetic
flux
propagate
applied
causing
localized
loss
superconductivity
changing
effective
resistance
control
line
deposited
coplanar
substrate
type
particularly
suited
temperature
superconductors
entirely
overlying
regions
utilized
variety
electrical
components
including
switching
circuits
amplifiers
oscillators
modulators
microwave
frequency
applications
temperature superconductors
microwave frequency
control line
superconducting film
electrical components
temperature superconductor
magnetic flux
switching circuit
link region
weak link
superconducting device
active superconducting
devices formed
film deposited
line formed
frequency applications
conducting film
main conduction
conduction channel
wave frequency
superconducting devices
film superconductor
electrical component
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