Microwave Absorption Study on (Bi,Pb)-Sr-Ca-Cu-O Granular Superconductors

• Authors: W. Jurga , L. Piekara-Sady , M. Gazda
• Languages of publication: EN

Abstracts

EN

(Bi,Pb)-Sr-Ca-Cu-O is considered as a system of 2201, 2212 and 2223 superconductors embedded in the insulating matrix. The size of the grains depends on the time of recrystallization. These types of ceramics exhibit a two-step transition to superconducting state. Because electrical properties depend among other on the Josephson coupling between grains, the magnetically modulated microwave absorption study was undertaken. Magnetically modulated microwave absorption signal was observed to arise just as temperature had been lowered below T₁. The shape of this signal was studied to recognize the second temperature T₂. Some strong oscillations appear on magnetically modulated microwave absorption at lower temperatures, which might be related to local percolation breakdown in superconducting network.

Keywords

EN

74.70.-b; 74.72.-h; 74.45.+c

Discipline

• 74.72.-h: Cuprate superconductors
• 74.70.-b: Superconducting materials other than cuprates(for cuprates, see 74.72.-h; for superconducting films, see 74.78.-w)
• 74.45.+c: Proximity effects; Andreev reflection; SN and SNS junctions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 253-256

Dates

published

2008-07

received

2007-11-06

Contributors

author

W. Jurga

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
• Department of Physics, A. Mickiewicz University, Poznań, Poland

author

L. Piekara-Sady

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

M. Gazda

• Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Gdańsk, Poland

References

• 1. J. Stankowski, Sci. Instrum. 5, 193 (1990)
• 2. M. Gazda, Physica C 411, 170 (2004)
• 3. M. Gazda, Physica C 453, 57 (2007)
• 4. J. Stankowski, Appl. Magn. Reson. 2, 465 (1991)
• 5. P. Pureur, Phys. Rev. B 47, 11420 (1993)

Identifiers

DOI

10.12693/APhysPolA.114.253