Abstract
Microstructural and superconducting properties of YBa2Cu3O7−x thin films grownin situ on bare sapphire by pulsed laser deposition using YBa2Cu3O7−x targets doped with 7 and 10 wt% Ag have been studied. Ag-doped films grown at 730°C on sapphire have shown very significant improvement over the undoped YBa2Cu3O7−x films grown under identical condition. A zero resistance temperature of 90 K and a critical current density of 1·2×106 A/cm2 at 77 K have been achieved on bare sapphire for the first time. Improved connectivity among grains and reduced reaction rate between the substrate and the film caused due to Ag in the film are suggested to be responsible for this greatly improved transport properties.
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References
Chang C Cet al 1988Appl. Phys. Lett. 53 517
Char Ket al 1990Appl. Phys. Lett. 56 785
Clarke J 1969Proc. R. Soc. London A308 447
Cole B Fet al 1992Appl. Phys. Lett. 61 1727
De Gennes P G 1964Rev. Mod. Phys. 36 225
Frost H J 1994Mater. Charac. 32 257
Hegde M Set al 1993Phys. Rev. B48 6465
Holstein W Let al 1992Appl. Phys. Lett. 61 982
Jung Jet al 1990Phys. Rev. B42 6181
Kumar Det al 1993Appl. Phys. Lett. 62 3522
Merchant Pet al 1992Appl. Phys. Lett. 60 763
Naito Met al 1987J. Mater. Res. 2 713
Pinto Ret al 1993J. Appl. Phys. 73 5105
Singh R Ket al 1992Appl. Phys. Lett. 60 255
Schmidt Het al 1992Appl. Phys. Lett. 59 222
Tiefel T Het al 1989Mater. Lett. 7 363
Witanachchi Set al 1989Appl. Phys. Lett. 55 295
Wu Nae-Lihet al 1992Appl. Phys. Lett. 64 2932
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Kumar, D., Satyalakshmi, K.M., Manoharan, S.S. et al. Growth and characterization of laser-deposited Ag-doped YBa2Cu3O7−x thin films on bare sapphire. Bull. Mater. Sci. 17, 625–632 (1994). https://doi.org/10.1007/BF02757546
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DOI: https://doi.org/10.1007/BF02757546