Document Type

Article

Publication Date

6-2017

Publication Source

IEEE Transactions on Applied Superconductivity

Volume Number

27

Issue Number

4

First Page

1

Last Page

5

Publisher

The IEEE Council on Superconductivity

ISSN

1558-2515

Comments

(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

Abstract

The second- and third-order nonlinear microwave response of a superconducting YBa2Cu3O7 thin-film resonator was synchronously measured using three input tones. This technique permits the local measurement, and hence mapping, of intermodulation distortion inside the resonator. Second- and third-order IMD measured with a fixed probe relaxed in remarkably different ways after the removal of a static magnetic field. The second-order IMD relaxed by two different magnetic processes, a fast process that appears related to bulk remanent magnetization and a slow process that fits the description of Bean and Livingston. The third-order IMD relaxes by only one process that is distinct from the two processes controlling second order relaxation.

Keywords

high-temperature superconductors, intermodulation distortion, magnetic relaxation, superconducting microwave devices

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