Voltage-Current Characteristics of Bi-2223 Superconducting Tape Near T<sub>c</Sub> Under Γ Irradiation

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2004

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Wiley-v C H verlag Gmbh

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Mathematics
(2000)
The Atılım University Department of Mathematics was founded in 2000 and it offers education in English. The Department offers students the opportunity to obtain a certificate in Mathematical Finance or Cryptography, aside from their undergraduate diploma. Our students may obtain a diploma secondary to their diploma in Mathematics with the Double-Major Program; as well as a certificate in their minor alongside their diploma in Mathematics through the Minor Program. Our graduates may pursue a career in academics at universities, as well as be hired in sectors such as finance, education, banking, and informatics. Our Department has been accredited by the evaluation and accreditation organization FEDEK for a duration of 5 years (until September 30th, 2025), the maximum FEDEK accreditation period achievable. Our Department is globally and nationally among the leading Mathematics departments with a program that suits international standards and a qualified academic staff; even more so for the last five years with our rankings in the field rankings of URAP, THE, USNEWS and WEBOFMETRIC.
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Department of Electrical & Electronics Engineering
Department of Electrical and Electronics Engineering (EE) offers solid graduate education and research program. Our Department is known for its student-centered and practice-oriented education. We are devoted to provide an exceptional educational experience to our students and prepare them for the highest personal and professional accomplishments. The advanced teaching and research laboratories are designed to educate the future workforce and meet the challenges of current technologies. The faculty's research activities are high voltage, electrical machinery, power systems, signal and image processing and photonics. Our students have exciting opportunities to participate in our department's research projects as well as in various activities sponsored by TUBİTAK, and other professional societies. European Remote Radio Laboratory project, which provides internet-access to our laboratories, has been accomplished under the leadership of our department with contributions from several European institutions.

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Abstract

Voltage-current characteristics at four different applied magnetic fields (7, 20, 30, and 40 mT) of Bi2Sr2Ca2CU3Ox superconducting tape were measured in the temperature range from 100 to 115 K. They were also measured at zero magnetic field before and after gamma irradiations up to 10 MRad at different temperatures just below the critical temperature. The data were fitted to a power law expression V = I (beta(T)) in which the exponential parameter P under 20 mT field and after irradiation is found to fluctuate around three and then drops to unity near the critical temperature which may be interpreted as a sign of Kosterlitz-Thouless transition. The electrical properties of the tape were found to be very sensitive to gamma irradiation where most of the changes take place in low gamma doses.

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Ercan, ismail/0000-0001-6490-3792; Kayed, Tarek/0000-0003-3482-4166
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Ercan, ismail ORCID logo
Kayed, Tarek ORCID logo

Keywords

Bi-2223, gamma irradiation, critical temperature, voltage-current characteristics, kosterlitz-thouless transition

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Q3

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Volume

39

Issue

3

Start Page

255

End Page

258

URI

https://doi.org/10.1002/crat.200310179
 https://hdl.handle.net/20.500.14411/1100

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