High resolution magneto-optical study of superconducting thin films and devices

Flament, Stéphane; Warsito,; Cordier, Christophe; Méchin, Laurence; Bloyet, Daniel

doi:10.1109/77.919737

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…Also the optimal contrast is obtained not with ␣ϭ90°, but by turning the analyzer slightly (Ϸ4°). 11 In practice the incident light is not uniform over the whole field, which is one of the things the image processing corrects for. Also the MO indicator film is not perfect, and we need to consider the different kinds of possible defects affecting the observed image.…”

Section: ϭVlh ͑2͒mentioning

confidence: 99%

Image correction in magneto-optical microscopy

Paturi

Larsen

Jacobsen

et al. 2003

Review of Scientific Instruments

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An image-processing procedure that assures correct determination of the magnetic field distribution of magneto-optical images is presented. The method remedies image faults resulting from sources that are proportional to the incident light intensity, such as different types of defects in the indicator film and unevenness of light, as well as additive signals from detector bias, external light sources, etc. When properly corrected a better measurement of the local magnetic field can be made, even in the case of heavily damaged films. For superconductors the magnetic field distributions may be used for accurate determination of the current distributions without the spurious current loops associated with defects in the films.

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Section: ϭVlh ͑2͒mentioning

confidence: 99%

Image correction in magneto-optical microscopy

Paturi

Larsen

Jacobsen

et al. 2003

Review of Scientific Instruments

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“…11,12 The MO garnet must also be perfectly cleaned, so as to be in direct contact with the superconductor ͑no residual dust͒. 11,12 The MO garnet must also be perfectly cleaned, so as to be in direct contact with the superconductor ͑no residual dust͒.…”

Section: A Samples Preparationmentioning

confidence: 99%

Magneto-optical setup for in situ strain and transport measurements on superconductors

Villaume

Antonevici

Bourgault

et al. 2008

Review of Scientific Instruments

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A recently developed magneto-optical (MO) imaging setup for investigations on superconductors is reported. The main originality of our setup is its ability to combine both strain and transport measurements in the temperature range of 6-300 K with magneto-optical observations. We give here some theoretical considerations on the cryostat conception, which is a key point of our setup. In particular, the thermal and mechanical aspects are discussed. A detailed description of the MO setup and of the associated strain apparatus is given. Additionally, an example of MO strain and transport study on DyBCO coated conductors is given. Evidence of Luders Bands formation under strain in the Hastelloy is revealed by the field penetration inside cracks in the DyBCO and MgO layers. A correlation between the damaging morphology and the critical current at 70 K versus strain has been established.

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High resolution magneto-optical study of superconducting thin films and devices

Cited by 2 publications

References 11 publications

Image correction in magneto-optical microscopy

Image correction in magneto-optical microscopy

Magneto-optical setup for in situ strain and transport measurements on superconductors

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