NDLI: Intrinsic Surface Resistance of YBCO Thin Films Under DC Magnetic Field

Content Provider	IEEE Xplore Digital Library
Author	Nakagawa, K. Honma, T. Takeda, K. Ono, S. Kai, H. Saito, A. Mukaida, M. Nakajima, K. Ohshima, S.
Copyright Year	2002
Abstract	We investigated the dc magnetic field and temperature dependences of the microwave intrinsic surface resistance (R_s^int) of YBa₂Cu₃O_y (YBCO) superconducting thin films with various thicknesses. We used YBCO films from 100, 200, and 300 nm thick YBCO films deposited on CeO₂/Al₂O₃ substrates. The R_s^int is means the surface resistance of YBCO film without the dielectric loss of the substrates. The R_s^int was obtained from measured surface resistance (R_s) by using a phenomenological equation. The R_s was measured using the dielectric resonator method at 21.8 GHz. A dc magnetic field of up to 5.0 T was applied parallel to the c-axis of the superconducting thin films during the R_s measurements. The R_s^int of the YBCO thin films increased when the dc magnetic field was applied. These relations could be explained with the two-fluid model for high-frequency and high-magnetic field limits. The R_s^int ratio (defined as R_s^int (5T)/R_s^int (0T)) slightly decreased with the film thickness. These results indicate that the R_s^int of HTS films depends on the film thickness in the dc magnetic field and the R_s^int in a dc magnetic field may be related to the pinning center in the HTS films.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	587
Ending Page	590
Page Count	4
File Size	217271
File Format	PDF
ISSN	10518223
Volume Number	21
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Yttrium barium copper oxide Superconducting magnets Electrical resistance measurement Superconducting microwave devices Surface resistance YBa$_{2}{\rm \hbox{Cu}}_{3}{\hbox{O}}_{7-\delta}$ thin film
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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