Investigation Of YBa2Cu3O7-gd Films Grown on Vicinally-Polished MgO Substrates


X-ray diffraction and transmission electron microscopy have been used to study the morphology and defect structure of YBa2Cu3O7-δ films on {xc[001]} MgO substrates polished away from the {xc[001]} crystallographic axis towards either {xc[010]} or {xc[110]} by angles ranging from 1° to 20°. On the {xc[010]} off-axis substrates it was found that growth of the YBCO film was highly influenced by the surface normal of the substrate with only very weak alignment to the substrate {xc[001]} direction. All {xc[010]}-angled samples maintained Tcs's of 86K. Angles of 1°, 2.5°, and 5° toward {xc[010]} produced films with large mosaic spread parallel to the direction of the angle, as high as 4° FWHM for the 5° sample. Critical current densities of these films remained as high as those of films grown on on-axis substrates, e.g. 4.4x107 A/cm2 at 4.2 K and zero applied field. Larger off-axis angles led to samples with reduced mosaic spread but still alignment to the surface normal, and reduced Jcs's of 2x107 A/cm2 and 1xl05 A/cm2 for 10° and 20° angles, respectively. TEM investigation and in-plane x-ray examination of the 5°, 10°, and 20° samples show good in-plane texture except for the 20° sample, and increased granularity with angle. Films on substrates polished off-axis towards {xc[110]} have degraded Tcs's and Jcs's for all angles.

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  1. 1.

    C.B. Eom, J.Z. Sun, K. Yamamoto, A.F. Marshall, K.E. Luther, and T.H. Geballe, Appl. Phys. Lett. 55, 595 (1989).

    CAS  Article  Google Scholar 

  2. 2.

    L.A. Tietz, C.B. Carter, D.K. Lathrop, S.E. Russek, R.A. Buhrman, and J.R. Michael, J. Mater. Res. 4, 1072 (1989).

    CAS  Article  Google Scholar 

  3. 3.

    T.K. Worthington, W.J. Gallagher, and T.R. Dinger, Phys. Rev. Lett. 59, 1160 (1987).

    CAS  Article  Google Scholar 

  4. 4.

    G. Deutscher and K.A. Müller, Phys. Rev. Lett. 59, 1745 (1987).

    CAS  Article  Google Scholar 

  5. 5.

    D. Dimos, P. Chaudhari, and J. Mannhart, Phys. Rev. B 41, 4038 (1990).

    CAS  Article  Google Scholar 

  6. 6.

    J.W. Lee and H.L. Tsai, J. Vac. Sci. Technol. B 5, 819 (1987).

    CAS  Article  Google Scholar 

  7. 7.

    C.H. Chen, J. Kwo, and M. Hong, Appl. Phys. Lett. 52, 841 (1988).

    CAS  Article  Google Scholar 

  8. 8.

    S.K. Streiffer, B.M. Lairson, C.B. Eom, A.F. Marshall, J.C. Bravman, and T.H. Geballe, Mater. Res. Soc. Symp. Proc. 183, 363 (1990).

    CAS  Article  Google Scholar 

  9. 9.

    J. N. Eckstein, I. Bozovic, D.G. Schlom, and J.S. Harris.Jr., to be published in Appl. Phys. Lett. 57, 1049 (1990).

    CAS  Article  Google Scholar 

  10. 10.

    J.D. Budai, R. Feenstra, L.A. Boatner, D.H. Lowndes, and D.P. Norton, Bull. Am. Phys. Soc. 35, 679 (1990).

    Google Scholar 

  11. 11.

    S.K. Streiffer, B.M. Lairson, and J.C. Bravman, Appl. Phys. Lett. 57, (1990).

  12. 12.

    C.P. Bean, Phys. Rev. Lett. 8, 250 (1962).

    Article  Google Scholar 

  13. 13.

    C.B. Eom,, Physica C 171, 354 (1990).

    CAS  Article  Google Scholar 

  14. 14.

    B.M. Lairson, S.K. Streiffer, J.C. Bravman, Phys. Rev. B 42, 10067 (1990).

    CAS  Article  Google Scholar 

  15. 15.

    T.E. Mitchell, S. Basu, M.A. Nastasi, and T. Roy, Mater. Res. Soc. Symp. Proc. 183, 357 (1990).

    CAS  Article  Google Scholar 

  16. 16.

    S.K. Streiffer, C.B. Eom, J.C. Bravman, and T.H. Geballe, unpublished result.

  17. 17.

    D.M. Hwang, T.S. Ravi, R. Ramesh, Siu-Wai Chan, C.Y. Chen, L. Nazar, X.D. Wu, A. Inam, and T. Venkatesan, Appl. Phys. Lett. 57, 1690 (1990).

    CAS  Article  Google Scholar 

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This work was supported by EPRI under contract #RP8009- 11, and by the Stanford Center for Materials Research through the NSF-MRL program. We would also like to thank South Bay Technology for the use of a Model 515 Dimpler, G. Waychunas of CMR for help

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Correspondence to S. K. Streiffer.

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Streiffer, S.K., Lairson, B.M. & Bravman, J.C. Investigation Of YBa2Cu3O7-gd Films Grown on Vicinally-Polished MgO Substrates. MRS Online Proceedings Library 209, 777–782 (1990).

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