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Magneto-optical study of grain boundaries, interfaces and grain boundary networks in YBaCuO

Published online by Cambridge University Press:  18 March 2011

Ch. Jooss ,
L.-O. Kautschor ,
M.P. Delamare ,
B. Bringmann ,
K. Guth ,
V. Born ,
S. Sievers ,
H. Walter ,
J. Dzick  and
J. Holzmann
...Show all authors
Ch. Jooss
Affiliation:
Institut für Materialphysik, University of Göttingen, Germany
L.-O. Kautschor
Affiliation:
Institut für Materialphysik, University of Göttingen, Germany
M.P. Delamare
Affiliation:
Institut für Materialphysik, University of Göttingen, Germany
B. Bringmann
Affiliation:
Zentrum für Funktionswerkstoffe, Göttingen, Germany
K. Guth
Affiliation:
Institut für Materialphysik, University of Göttingen, Germany
V. Born
Affiliation:
Institut für Materialphysik, University of Göttingen, Germany
S. Sievers
Affiliation:
Institut für Materialphysik, University of Göttingen, Germany
H. Walter
Affiliation:
Zentrum für Funktionswerkstoffe, Göttingen, Germany
J. Dzick
Affiliation:
Zentrum für Funktionswerkstoffe, Göttingen, Germany
J. Holzmann
Affiliation:
Zentrum für Funktionswerkstoffe, Göttingen, Germany
H. C. Freyhardt
Affiliation:
Institut für Materialphysik, University of Göttingen, Germany Zentrum für Funktionswerkstoffe, Göttingen, Germany
B. de Boer
Affiliation:
IFW Dresden, Institute of metallic materials, Germany
B. Holzapfel
Affiliation:
IFW Dresden, Institute of metallic materials, Germany
F. Sandiumenge
Affiliation:
Institut de Ciència de Materials, Universitat Autònoma de Barcelona, Catalonia, Spain
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Abstract

Using quantitative magneto-optics and an inversion scheme of Biot-Savart's law the local current carrying capability of various types of grain boundaries (GB's) and interfaces in YBaCuO thin films and bulk material was investigated. In all GB's and interfaces a spatial variation of the local critical current density jc was observed which, however, has different reasons, such as microstructural inhomogeneities, magnetic field dependence of jc and size effects in extended GB's and networks of low angle grain boundaries (LAGB's).

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References

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