Superconducting YBCO films on polycrystalline yttrium-iron-garnet using IBAD-YSZ as a template

Author

Jia, Q.X. ; Arendt, P.N. ; Foltyn, S.R. ; Holesinger, T.G. ; DePaula, AndR F.

Author_Institution

Supercond. Technol. Center, Los Alamos Nat. Lab., NM, USA

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3489

Lastpage

3492

Abstract

Monolithic integration of high quality YBCO films on polycrystalline yttrium-iron-garnet (YIG) substrates represents an advance of great technical significance for magnetically tunable microwave components. We have solved the problems of crystallographic incompatibility between the two materials and the lack of an epitaxial template for the growth of well-oriented YBCO films. Using a buffer layer of biaxially oriented yttria-stabilized zirconia (YSZ), deposited by an ion-beam-assisted-deposition (IBAD) technique, we routinely produced device quality YBCO films on polycrystalline YIG substrates. The YBCO films were c-axis oriented with an in-plane mosaic spread of less than 7° FWHM. The films had transition temperatures above 88 K, transition widths less than 0.3 K, and critical current densities above 10⁶ A/cm² in self-field at 75 K. The surface resistance of the films was ~0.86 mΩ at 10 GHz and 76 K

Keywords

barium compounds; critical current density (superconductivity); garnets; high-frequency effects; high-temperature superconductors; ion beam assisted deposition; superconducting thin films; superconducting transition temperature; surface conductivity; yttrium compounds; zirconium compounds; 0.86 mohm; 10 GHz; 75 K; 76 K; 88 K; FWHM; IBAD-YSZ template; YBa2Cu3O7-Y2O3ZrO2-YFe5O12; YBa₂Cu₃O₇-Y₂O₃(ZrO₂)-YIG; YIG; biaxially oriented yttria-stabilized zirconia; buffer layer; c-axis oriented; critical current densities; crystallographic incompatibility; epitaxial template; high quality YBCO films; in-plane mosaic spread; ion-beam-assisted-deposition; magnetically tunable microwave components; monolithic integration; polycrystalline yttrium-iron-garnet; self-field; superconducting YBCO films; surface resistance; transition temperatures; transition width; Magnetic films; Monolithic integrated circuits; Substrates; Superconducting epitaxial layers; Superconducting films; Superconducting magnets; Superconducting microwave devices; Superconducting transition temperature; Surface resistance; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919815

Filename

919815