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Defect-Mediated Growth of YBa2Cu3O7-δ Films

  • D. G. Schlom (a1), D. Anselmetti (a2), J. G. Bednorz (a3), Ch. Gerber (a3) and J. Mannhar (a3)...


The evolution of the surface microstructure of sputtered c-axis oriented epitaxial YBa2Cu3O7-δ films has been monitored by scanning tunneling microscopy (STM). The results indicate that growth is dominated by the incorporation of depositing species at defect sites. These defect sites, which provide energetically favorable positions for accommodating the arriving species, are at ledges—either along growth spirals emanating from screw dislocations, or due to the closely spaced surface steps arising from the macroscopic tilt of the substrate. If the substrate is misoriented sufficiently, the depositing species may diffuse to and be accommodated by these surface steps, without the supersaturation on the terraces attaining a high enough level for two-dimensional nucleation to occur. Under these conditions, growth occurs by step propagation. Otherwise, a high density of screw dislocations (≈109 cm-2) is nucleated during the initial stages of growth, which provides a continual supply of ledge incorporation sites in the vicinity of the depositing species. The surface evolution reported appears to be an intrinsic feature of c-axis oriented YBa2Cu3O7-δ films for a wide range of growth conditions, irrespective of the substrate material or vapor phase deposition method.



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[1] Gerber, Ch., Anselmetti, D., Bednorz, J.G., Mannhart, J., and Schlom, D.G., Nature 350, 279 (1991).
[2] Hawley, M., Raistrick, I.D., Beery, J.G., Houlton, R.J., Science 251, 1587 (1991).
[3] Moreland, J., Rice, P., Russek, S.E., Jeanneret, B., Roshko, A., Ono, R.H., and Rudman, D.A., Appl. Phys. Lett. 59, 3039 (1991).
[4] Hawley, M.E., Raistrick, I.D., Houlton, R.J., Garzon, F.H., and Piza, M., Ultramicroscopy 42–44, 705 (1992).
[5] Maggio-Aprile, I., Kent, A.D., Niedermann, Ph., Renner, Ch., Antognazza, L., MiéVille, L., Brunner, O., Triscone, J.-M., and Fischer, Ø., Ultramicroscopy 42–44, 728 (1992).
[6] Schlom, D.G., Anselmetti, D., Bednorz, J.G., Broom, R.F., Catana, A., Frey, T., Gerber, Ch., Güntherodt, H.-J., Lang, H.P., and Mannhart, J., Z. Phys. B 86, 163 (1992).
[7] Burger, J., Bauer, P., Veith, M., and Saemann-Ischenko, G., Ultramicroscopy 42–44, 721 (1992).
[8] Olin, H., Brorsson, G., Davidsson, P., Ivanov, Z.G., Nilsson, P.-Å., and Claeson, T., Ultramicroscopy 42–44, 734 (1992).
[9] McElfresh, M., Miller, T.G., Schaefer, D.M., Reifenberger, R., Muenchausen, R.E., Hawley, M., Foltyn, S.R., and Wu, X.D., J. Appl. Phys. 71, 5099 (1992).
[10] Haefke, H., Lang, H.P., Sum, R., Güntherodt, H.-J., Berthold, L., and Hesse, D., Appl. Phys. Lett. 61, 2359 (1992).
[11] Baudenbacher, F., Hirata, K., Berberich, P., Kinder, H., Assmann, W., and Lang, H.P., Physica C 185–189, 2177 (1991).
[12] Chandrasekhar, N., Agrawal, V., Achutharaman, V.S., and Goldman, A.M., Appl. Phys. Lett. 60, 2424 (1992)
[13] Wang, H.S., Eissler, D., Dietsche, W., Fischer, A., and Ploog, K., submitted to J. Cryst. Growth.
[14] Mannhart, J., Anselmetti, D., Bednorz, J.G., Catana, A., Gerber, Ch., Müller, K.A., and Schlom, D.G., Z. Phys. B 86, 177 (1992).
[15] Schlom, D.G. in International Workshop on Superconductivity Co-Sponsored by ISTEC and MRS: Controlled Growth of Single- and Poly-Crystals of High Temperature Superconductors (ISTEC/MRS, Honolulu, 1992), p. 34.
[16] Chakraverty, B.K. and Pound, G.M., Acta Metall. 12, 851 (1964).
[17] Frank, F.C., Disc. Farad. Soc. 5, 48 (1949).
[18] Verma, A.R., Crystal Growth and Dislocations (Butterworths, London, 1953).
[19] Lemmlein, G.G. and Dukova, E.D., Sov. Phys. Crystallogr. 1, 269 (1956).
[20] Kozlovskii, M.I., Sov. Phys. Crystallogr. 3, 206 (1958).
[21] Kozlovskii, M.I., Sov. Phys. Crystallogr. 3, 236 (1958).
[22] Baronnet, A., J. Cryst. Growth 19, 193 (1973).
[23] Norton, M.G. and Carter, C.B., J. Cryst. Growth 110, 641 (1991).
[24] Nishinaga, T., Shitara, T., Mochizuki, K., and Cho, K.I., J. Cryst. Growth 99, 482 (1990).
[25] Chandrasekhar, N. (private communication) for the growth of YBa2Cu3O7-δ by MBE.
[26] Frey, T. (private communication) for the growth of YBa2Cu3O7-δ by PLD.
[27] See for example, Streiffer, S.K., Lairson, B.M., Eom, C.B., Clemens, B.M., Bravman, J.C., and Geballe, T.H., Phys. Rev. B 43, 13007 (1991).
[28] Catana, A., Broom, R.F., Bednorz, J.G., Mannhart, J., and Schlom, D.G., Appl. Phys. Lett. 60, 1016 (1992).
[29] Catana, A., Bednorz, J.G., Gerber, Ch., Mannhart, J., and Schlom, D.G., submitted to Appl. Phys. Lett.
[30] Streiffer, S.K. in Proceedings of the 49th Annual Meeting of the Electron Microscopy Society of America, edited by Bailey, G.W. (EMSA, San Francisco, 1991) p. 1070.
[31] Maggio-Aprile, I. (private communication).


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