Superconductive magnetic field coil integrated with Josephson junction and preparation method thereof

Abstract

The invention provides a superconductive magnetic field coil integrated with a Josephson junction and a preparation method thereof. The superconductive magnetic field coil comprises a plurality of bottom magnetic field coil layers, a plurality of top magnetic field coil layers and a second insulation material layer. The plurality of bottom magnetic field coil layers and the plurality of top magnetic field coil layers are separated by the second insulation material layer. Holes are arranged in the second insulation material layer. The holes are filled with third superconductive material layers. The top magnetic field coil layers are connected with two adjacent bottom magnetic field coil layers through the third superconductive material layers in the holes, thereby forming a whole superconductive magnetic field coil. According to the superconductive magnetic field coil prepared by the invention, a magnetic field can be produced at the Josephson junction. An introduced current numerical value is smaller than the value of a current required by the prior art, a magnetic field range of the Josephson junction in magnetic field change measurement can be expanded, and the measurement efficiency is improved.

Description

technical field [0001] The invention belongs to the field of superconducting quantum interference devices (SQUID), in particular to a superconducting magnetic field coil integrated in a Josephson junction and a preparation method thereof. Background technique [0002] The Josephson junction is an important part of superconducting electronic devices such as superconducting quantum interference devices (SQUID), superconducting qubits (qubit), superconducting digital circuits (RSFQ), etc. It usually uses superconductor-insulating layer- The structure of a superconductor (SIS), such as figure 1 As shown, the thickness of the insulating layer is very thin, usually in the thickness of tens of nanometers. The properties of the Josephson junction are closely related to the properties of the above-mentioned superconducting electronic devices. Therefore, the characterization of the electrical properties of the Josephson junction is not only helpful to deepen the understanding of the ...

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a superconducting magnetic field coil integrated in the Josephson junction and its preparation method, which is used to solve the problem of measuring the critical current of the Josephson junction changing with the magnetic field in the prior art When the current into the wire is large, and the size of the solenoid is large, etc.

Images