Large area magneto-optical investigations of YBCO thin films

Kuhn, Marcus; Schey, Bernd; Biegel, Wolfgang; Stritzker, Bernd; Eisenmenger, Johannes; Leiderer, Paul

Large area magneto-optical investigations of YBCO thin films

Dateien

269_revsciinstr_1999.pdfGröße: 756.23 KBDownloads: 431

Datum

1999

Autor:innen

Kuhn, Marcus

Schey, Bernd

Biegel, Wolfgang

Stritzker, Bernd

Eisenmenger, Johannes

Leiderer, Paul

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Review of Scientific Instruments. 1999, 70(3), pp. 1761-1766. Available under: doi: 10.1063/1.1149665

Zusammenfassung

A new apparatus for magneto-optical investigations of high temperature superconducting (HTS) films as large as 20x20 cm2 is presented. With this equipment flux penetration of an external magnetic field into YBCO thin films has been studied by scanning the samples through an inhomogeneous magnetic field (magneto-optical scanning technique, MOST). The normal penetration of magnetic flux into a superconductor will be changed drastically in the presence of defects. The apparatus was constructed to realize an effective quality control of large area HTS thin films used for device fabrication. With this technique, a visualization of flux pattern in superconducting films larger than 131 cm2 is presented for the first time. The results are compared to inductive jc measurements as well as to micrographs (optical microscope (OM), scanning electron microscopy (SEM)) and show that also in the large area characterization the magneto-optical method is very sensitive to microstructural defects impairing the critical current density, which is the relevant parameter for an application of the superconducting thin films. Moreover, it could be shown that MOST has appreciable advantages compared to inductive jc scans and microscopy (OM, SEM). In particular it is possible to observe defects, which are below the optical resolution of the MOST setup.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

KUHN, Marcus, Bernd SCHEY, Wolfgang BIEGEL, Bernd STRITZKER, Johannes EISENMENGER, Paul LEIDERER, 1999. Large area magneto-optical investigations of YBCO thin films. In: Review of Scientific Instruments. 1999, 70(3), pp. 1761-1766. Available under: doi: 10.1063/1.1149665

BibTex

@article{Kuhn1999Large-5287,
  year={1999},
  doi={10.1063/1.1149665},
  title={Large area magneto-optical investigations of YBCO thin films},
  number={3},
  volume={70},
  journal={Review of Scientific Instruments},
  pages={1761--1766},
  author={Kuhn, Marcus and Schey, Bernd and Biegel, Wolfgang and Stritzker, Bernd and Eisenmenger, Johannes and Leiderer, Paul}
}

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