Superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} thin films on polycrystalline ferrite for magnetically tunable microwave components

Journal Article · Tue Mar 31 23:00:00 EST 1998 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.121177· OSTI ID:624845

Jia, Q X; Findikoglu, A T; Arendt, P; Foltyn, S R; Roper, J M; Groves, J R; Coulter, J Y ^[1]; Li, Y Q ^[2]; Dionne, G F ^[3]

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1. Superconductivity Technology Center, Mail Stop K763, Los Alamos National Laboratory, Los Alamos, New Mexico87545 (United States)
2. NZ Applied Technologies, 150-C New Boston Street, Woburn, Massachusetts01801 (United States)
3. Lincoln Laboratory, Massachusetts Institute of Technology, 244 Wood Street, Lexington, Massachusetts02173 (United States)

Superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} (YBCO) thin films with a surface resistance of 0.86 m{Omega} at 10 GHz and 76 K have been grown on polycrystalline ferrite yttrium iron garnet (YIG) substrates. The chemical and structural mismatches between YBCO and YIG are solved by using a double buffer layer of biaxially oriented yttria-stabilized zirconia (YSZ) and CeO{sub 2}, where YSZ is deposited by an ion-beam-assisted-deposition technique. The YBCO films are {ital c} axis oriented with an in-plane mosaic spread [full width at half maximum of an x-ray {phi}-scan on (103) reflection] of less than 8{degree}. The films have a superconductive transition temperature above 88 K with a transition width less than 0.3 K, giving a critical current density above 10{sup 6}A/cm{sup 2} in self field at 75 K. At 75 K in an external magnetic field of 1 T perpendicular to the film surface, the films maintain a critical current density over 2{times}10{sup 5}A/cm{sup 2}. {copyright} {ital 1998 American Institute of Physics.}

• OSTI ID: 624845
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 14 Vol. 72; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
BARIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
FERRITE GARNETS
HIGH-TC SUPERCONDUCTORS
MICROWAVE RADIATION
SUPERCONDUCTING FILMS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM OXIDES