Experimental investigation of the kinetic inductance in YBa 2Cu3O7 square washer superconducting quantum interference devices

Dirk Grundler, Bernd David, Olaf Doessel

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The inductance Ls of YBa2Cu3O7 thin-film square washer dc superconducting quantum interference devices was measured directly from 4.2 K up to the critical temperature Tc of the film. Ls(T) diverges close to Tc. Examining the temperature dependence of Ls two contributions are distinguished: the magnetic inductance, defined by the outer device geometry, and the temperature-dependent kinetic inductance Lk associated with the thin-film slit structure. Lk is found to scale with the square of the magnetic penetration depth λ(T) in a broad temperature range. The specific magnetic inductance per unit length of a long slit within the washer is measured to be ∼0.3 pH/μm. The impact of Ls(T) on device performance at elevated temperature is discussed.

Original languageEnglish
Pages (from-to)5273-5277
Number of pages5
JournalJournal of Applied Physics
Volume77
Issue number10
DOIs
StatePublished - 1995
Externally publishedYes

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