NDLI: Effects of Proton Irradiation on the Microwave Surface Resistance of <formula formulatype=inline><tex>${rm YBa}_{2}{rm Cu}_{3}{rm O}

Content Provider	IEEE Xplore Digital Library
Author	Jae Hun Lee Woo Il Yang Eun Kyu Park Sang Young Lee
Copyright Year	2002
Description	Proton irradiations on superconducting bulk materials and thin films have enabled to enhance the critical current density and the upper critical field in the mixed state due to increased vortex pinning. We investigated the microwave surface resistance of proton-irradiated (YBCO) films grown on (LAO) substrates. The intrinsic was measured at 8.5 GHz at temperatures of 7-90 K with the effects of the finite film thickness taken into account. Significant reduction in the of YBCO films were observed at temperatures of 40 K to 70 K when the films were irradiated with 20 MeV proton for 10 minutes to the fluence of with the value of 100 of the proton-irradiated one at 60 K appearing significantly lower than the corresponding one of 140 before irradiation. However, at temperatures below 20 K, the of the irradiated YBCO films was higher than that of the YBCO film before irradiation with the residual of the former appearing higher than that of the latter. No significant changes in the of YBCO films were observed when the films were irradiated with 20 MeV proton for 30-120 minutes to the fluences of to . The reduction in the of proton-irradiated YBCO films at 40-70 K was attributed to enhanced impurity scattering rate of compared to a value of for unirradiated YBCO.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3593
Ending Page	3596
Page Count	4
File Size	239865
File Format	PDF
ISSN	10518223
Volume Number	17
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface resistance Protons Yttrium barium copper oxide Temperature Superconducting materials Superconducting microwave devices Superconducting thin films Critical current density Superconducting films Substrates ${\rm YBa}_{2}{\rm Cu}_{3}{\rm O}_{7-\delta}$ film Proton irradiation scattering rate surface resistance
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Effects of Proton Irradiation on the Microwave Surface Resistance of ${rm YBa}_{2}{rm Cu}_{3}{rm O}_{7-delta}$ Films

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