MICROWAVE SURFACE-RESISTANCE OF YBA2CU3O7-DELTA FILMS ON POLYCRYSTALLINE ALUMINA AND NI-BASED ALLOY SUBSTRATES WITH ION-BEAM-ASSISTED-DEPOSITED BUFFER LAYERS

Authors
FINDIKOGLU AT ARENDT PN GROVES JR FOLTYN SR PETERSON EJ REAGOR DW JIA QX
Citation
At. Findikoglu et al., MICROWAVE SURFACE-RESISTANCE OF YBA2CU3O7-DELTA FILMS ON POLYCRYSTALLINE ALUMINA AND NI-BASED ALLOY SUBSTRATES WITH ION-BEAM-ASSISTED-DEPOSITED BUFFER LAYERS, IEEE transactions on applied superconductivity, 7(2), 1997, pp. 1232-1235
Citations number
17
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied
Journal title
IEEE transactions on applied superconductivity → ACNP
ISSN journal
10518223
Volume
7
Issue
2
Year of publication
1997
Part
2
Pages
1232 - 1235
Database
ISI
SICI code
1051-8223(1997)7:2<1232:MSOYFO>2.0.ZU;2-4
Abstract
We measured the microwave surface resistance R-s of superconducting YB a2Cu3O7-x (YBCO) films on buffered polycrystalline alumina and Ni-base d alloy substrates using parallel-plate technique, We observed a stron g correlation between the low-power R-s and the in-plane mosaic spread of the YBCO films. A 0.4-mu m-thick YBCO film with an in-plan mosaic spread of 6.6 degrees (7 degrees) on a buffered polycrystalline Ni-bas ed alloy (buffered polycrystalline alumina) substrate showed an R-s of 0.51 m Omega (1.89 m Omega) at 76 K and 0.17 m Omega (0.21 m Omega) a t 4 K.