NDLI: Microwave characteristics of Ag-doped YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// thin films grown on MgO

Content Provider	IEEE Xplore Digital Library
Author	Jeha Kim Seok-Kil Han Kwang-Yong Kang
Copyright Year	2002
Abstract	We prepared the Ag-doped YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// (Ag-YBCO) bulk pellets of undoped, 10 wt.%, and 20 wt% and grew high quality thin films on MgO (100) substrates from the pellet targets by pulsed laser deposition. The films are highly c-axis oriented with T/sub c//spl ap/85 K. At T=44 K, the observed critical current density, J/sub c/ was 2.70/spl times/10/sup 6/ A/cm/sup 2/ and 1.17/spl times/10/sup 6/ A/cm/sup 2/ for 10 wt.% and 20 wt.% Ag-YBCO films, respectively. The critical current density, J/sub c/, of the Ag-YBCO/MgO films was improved by 65% with Ag-doing with respect to that of the undoped film. Using meanderline microstrip resonators, we measured the low temperature microwave surface resistance, R/sub s/. The observed R/sub s/ value of the 20 wt.% Ag-YBCO film was as small as 0.71 m/spl Omega/ for at 36 K and 8 GHz. XRD and RBS analysis showed that no silver was in the Ag-YBCO films even for the largest composition of Ag (20 wt.%) in the target pellet.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1490
Ending Page	1493
Page Count	4
File Size	383902
File Format	PDF
ISSN	10518223
Volume Number	7
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulsed laser deposition Critical current density Temperature measurement Surface resistance Sputtering Substrates Optical pulses Microstrip resonators Electrical resistance measurement Microwave measurements
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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