Flux trapping and microstructure of bulk textured YBa2Cu3O6.9 ceramics prepared by the quench and melt growth technique

Czyżak, B.; Andrzejewski, B.; Stankowski, J.; Plesch, G.; Rosová, A.; Buchta, Š.; Danielik, L.

doi:10.1002/pssa.2211410119

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…The low-field Magnetically Modulated Microwave Absorption has been applied in investigations of magnetic flux trapping in highly oriented YBaCuO samples [26,27]. The oriented ceramic YBa,2Cu306.…”

Section: Flux Trappingmentioning

confidence: 99%

“…The oriented ceramic YBa,2Cu306. 9 sample of 3 % porosity was obtained by melt-quenching-melt-textured solidification [27] and studied by means of an EPR SE/X RADIOPAN spectrometer. The X-ray analysis showed that the grains were textured with their crystallographic c-axes arranged perpendicularly to the base of the cyllindrical sample, while the ab plane was parallel to this plane.…”

Section: Flux Trappingmentioning

confidence: 99%

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Inter- and intragrain effects in superconducting ceramics studied by Modulated Microwave Absorption

Czyżak

1995

Appl. Magn. Reson.

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Abstraet. The consequences of existence of intergrain weak links in sintered ceramic high-temperature superconductors are discussed. The review of possible mechanisms of high-frequency dissipation is presented. The Magnetically Modulated Microwave Absorption allowed distinguishing between the inter-and intragrain flux trapping as well as determination of Josephson critical fields Hcl J = 1.70e and He1G = 80.20e.

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Section: Flux Trappingmentioning

confidence: 99%

Section: Flux Trappingmentioning

confidence: 99%

Inter- and intragrain effects in superconducting ceramics studied by Modulated Microwave Absorption

Czyżak

1995

Appl. Magn. Reson.

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“…In this case, for an appropriate modulation amplitude, the detected signal is a derivative of the microwave power dissipated in the cavity, and is often called the magnetically modulated microwave absorption (MMMA). Measurements of microwave absorption have been applied to the studies of 2D and 3D phenomena [17,18], inter-and intragrain effects [19] and flux pinning [20].…”

Section: Introductionmentioning

confidence: 99%

Microwave absorption in high- superconductors in low magnetic fields

Czyżak¹

1996

Supercond. Sci. Technol.

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The existence of inter-and intragrain weak links strongly influences the microwave properties of high-temperature superconductors. Considering the properties of a network of resistively shunted, symmetric double contacts, we obtain a consistent description of the high-frequency dissipation in ceramics and single crystals in low magnetic fields. In this model, the temperature dependence of the high-frequency dissipation is determined by the critical current of the weak links and by the penetration depth. The high-frequency absorption line-width decreases when the penetration depth increases with temperature. The results of the measurements of magnetically modulated microwave absorption in single crystals and ceramics are interpreted in terms of the model presented.

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“…The granular structure of ceramic high-temperature superconductors (HTS) coupled with their very small coherence length leaves a deep imprint on their electromagnetic properties [1][2][3][4]. Because of the characteristic short coherence length ~ the presence of local inhomogeneities or defects leads to formation of weak links and plays a much more important role in high-temperature superconductors than in classical ones.…”

Section: Introductionmentioning

confidence: 99%

Lower Josephson critical field in granular HTS measured by microwave absorption

et al. 1995

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Abstrar The method of magnetically modulated microwave absorption (MMMA) has been used here to measure the lower Josephson critical field in a YBaCuO superconductor. The measurements based on the changes in the width of the hysteresis of the MMMA signal which were observed while increasing the range of the magnetic field sweep were carried out. The effects observed by us are explained using the Clem model of the cubic array of superconducting grains. Also, a simple interpretation of the influence of the magnetic modulation on the measured value of the lower Josephson critical field is provided.

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Flux trapping and microstructure of bulk textured YBa2Cu3O6.9 ceramics prepared by the quench and melt growth technique

Cited by 4 publications

References 19 publications

Inter- and intragrain effects in superconducting ceramics studied by Modulated Microwave Absorption

Inter- and intragrain effects in superconducting ceramics studied by Modulated Microwave Absorption

Microwave absorption in high- superconductors in low magnetic fields

Lower Josephson critical field in granular HTS measured by microwave absorption

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