Magnetic noise in YBCO thin films and its relationship to growth morphology

Author

Smithyman, J. ; Muirhead, C. ; Aindow, M. ; Welhofer, F. ; Woodall, P.

Author_Institution

Sch. of Phys., Birmingham Univ., UK

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

1624

Lastpage

1627

Abstract

We report preliminary measurements of the magnetic noise from a series of thin YBCO films close to the superconducting transition. This is part of a more extended study of the relationship of flux noise to film thickness and morphology. We find that there are two contributions to the noise, one which is dominant at and above the noise peak and is a function of the temperature dependent resistivity of the film and another which contributes the conventional 1/f noise and is dominant at lower temperatures. The relative contributions are affected by both magnetic field and film morphology.

Keywords

1/f noise; barium compounds; crystal morphology; electrical resistivity; high-temperature superconductors; magnetic noise; superconducting thin films; thermoelectricity; yttrium compounds; 1/f noise; YBCO thin films; YBa/sub 2/Cu/sub 3/O/sub 7/; film thickness; flux noise; growth morphology; magnetic field effects; magnetic noise; superconducting transition; temperature dependent resistivity; Conductivity; Magnetic films; Magnetic noise; Morphology; Noise measurement; Superconducting device noise; Superconducting films; Superconducting thin films; Temperature dependence; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.620888

Filename

620888