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Structural variability of edge dislocations in a SrTiO3 low-angle [001] tilt grain boundary

  • James P. Buban (a1), Miaofang Chi (a2), Daniel J. Masiel (a3), John P. Bradley (a4), Bin Jiang (a5), Henning Stahlberg (a1) and Nigel D. Browning (a6)...
Abstract

Using a spherical aberration (Cs)-corrected scanning transmission electron microscopy (STEM) and electron energy-loss spectroscopy (EELS), we investigated a 6° low-angle [001] tilt grain boundary in SrTiO3. The enhanced spatial resolution of the aberration corrector leads to the observation of a number of structural variations in the edge dislocations along the grain boundary that neither resemble the standard edge dislocations nor partial dislocations for SrTiO3. Although there appear to be many variants in the structure that can be interpreted as compositional effects, three main classes of core structure are found to be prominent. From EELS analysis, these classifications seem to be related to Sr deficiencies, with the final variety of the cores being consistent with an embedded TiOx rocksalt-like structure.

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a) Address all correspondence to this author. e-mail: jpbuban@ucdavis.edu
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1Mannhart, J., Chaudhari, P., Dimos, D., Tsuei, C.C., and McGuire, T.R.: Critical currents in [001] grains and across their tilt boundaries in YBa2Cu3O7 films. Phys. Rev. Lett. 61, 2476 (1988).
2Dimos, D., Chaudhari, P., and Mannhart, J.: Superconducting transport-properties of grain-boundaries in YBa3Cu3O7 bicrystal. Phys. Rev. B 41, 4038 (1990).
3Mathur, N.D., Burnell, G., Isaac, S.P., Jackson, T.J., Teo, B.S., MacManus-Driscoll, J.L., Cohen, L.F., Evetts, J.E., and Blamire, M.G.: Large low-field magnetoresistance in La0.7Ca0.3MnO3 induced by artificial grain boundaries. Nature 387, 266 (1997).
4Zhang, N., Ding, W.P., Zhong, W., Xing, D.Y., and Du, Y.W.: Tunnel-type giant magnetoresistance in the granular perovskite La0.85Sr0.15MnO3. Phys. Rev. B: Condens. Matter 56, 8138 (1997).
5Heywang, W.: Resistivity anomaly in doped barium titanate. J. Am. Ceram. Soc. 47, 484 (1964).
6Klie, R.F., Buban, J.P., Varela, M., Franceschetti, A., Jooss, C., Zhu, Y., Browning, N.D., Pantelides, S.T., and Pennycook, S.J.: Enhanced current transport at grain boundaries in high-TC superconductors. Nature 435, 475 (2005).
7Buban, J.P., Matsunaga, K., Chen, J., Shibata, N., Ching, W.Y., Yamamoto, T., and Ikuhara, Y.: Grain boundary strengthening in alumina by rare earth impurities. Science 311, 212 (2006).
8Sato, Y., Buban, J.P., Mizoguchi, T., Shibata, N., Yodogawa, M., Yamamoto, T., and Ikuhara, Y.: Role of Pr segregation in acceptor-state formation at ZnO grain boundaries. Phys. Rev. Lett. 97, 106802 (2006).
9Kim, M., Duscher, G., Browning, N.D., Sohlberg, K., Pantelides, S.T., and Pennycook, S.J.: Nonstoichiometry and the electrical activity of grain boundaries in SrTiO3. Phys. Rev. Lett. 86, 4056 (2001).
10Mo, S.D., Ching, W.Y., Chisholm, M.F., and Duscher, G.: Electronic structure of a grain-boundary model in SrTiO3. Phys. Rev. B: Condens. Matter 60, 2416 (1999).
11McGibbon, M.M., Browning, N.D., Chisholm, M.F., Mcgibbon, A.J., Pennycook, S.J., Ravikumar, V., and Dravid, V.P.: Direct determination of grain-boundary atomic-structure in SrTiO3. Science 266, 102 (1994).
12Ravikumar, V., Rodrigues, R.P., and Dravid, V.P.: An investigation of acceptor-doped grain boundaries in SrTiO3. J. Phys. D: Appl. Phys. 29, 1799 (1996).
13Rodrigues, R.P., Chang, H.J., Ellis, D.E., and Dravid, V.P.: Electronic structure of pristine and solute-incorporated SrTiO3: II, Grain-boundary geometry and acceptor doping. J. Am. Ceram. Soc. 82, 2385 (1999).
14Browning, N.D. and Pennycook, S.J.: Direct experimental determination of the atomic structure at internal interfaces. J. Phys. D: Appl. Phys. 29, 1779 (1996).
15Duscher, G., Buban, J.P., Browning, N.D., Chisholm, M.F., and Pennycook, S.J.: The electronic structure of pristine and doped (100) tilt grain boundaries in SrTiO3. Interface Sci. 8, 199 (2000).
16Klie, R.F. and Browning, N.D.: Atomic scale characterization of oxygen vacancy segregation at SrTiO3 grain boundaries. Appl. Phys. Lett. 77, 3737 (2000).
17Zhang, Z.L., Sigle, W., Kurtz, W., and Ruhle, M.: Electronic and atomic structure of a dissociated dislocation in SrTiO3. Phys. Rev. B: Condens. Matter 66, 094108 (2002).
18Zhang, Z.L., Sigle, W., and Ruhle, M.: Atomic and electronic characterization of the a[100] dislocation core in SrTiO3. Phys. Rev. B: Condens. Matter 66, 094108 (2002).
19Astala, R. and Bristowe, P.D.: First-principles calculations of an oxygen deficient Sigma=3 (111) [101] grain boundary in strontium titanate. J. Phys. Condens. Matter 14, 6455 (2002).
20Klie, R.F., Beleggia, M., Zhu, Y., Buban, J.P., and Browning, N.D.: Atomic-scale model of the grain boundary potential in perovskite oxides. Phys. Rev. B: Condens. Matter 68, 214101 (2003).
21Choi, S.Y., Buban, J.P., Nishi, M., Kageyama, H., Shibata, N., Yamamoto, T., S.Kang, J.L., and Ikuhara, Y.: Dislocation structures of low-angle boundaries in Nb-doped SrTiO3 bicrystals. J. Mater. Sci. 41, 2621 (2006).
22Varela, M., Findlay, S.D., Lupini, A.R., Christen, H.M., Borisevich, A.Y., Dellby, N., Krivanek, O.L., Nellist, P.D., Oxley, M.P., Allen, L.J., and Pennycook, S.J.: Spectroscopic imaging of single atoms within a bulk solid. Phys. Rev. Lett. 92, 095502 (2004).
23Sutton, A.P. and Ballurri, R.W.: Interfaces in Crystalline Materials (Claredon Press, Oxford, 1995).
24Buban, J.P., Iddir, H., and Ogut, S.: Structural and electronic properties of oxygen vacancies in cubic and antiferrodistortive phases of SrTiO3. Phys. Rev. B: Condens. Matter 69, 180102 (2004).
25Sankaraman, M. and Perry, D.: Valence determination of titanium and iron using electron-energy loss spectroscopy. J. Mater. Sci. 27, 2731 (1992).
26Mizoguchi, T., Sato, Y., Buban, J.P., Matsunaga, K., Yamamoto, T., and Ikuhara, Y.: Sr vacancy segregation by heat treatment at SrTiO3 grain boundary. Appl. Phys. Lett. 87, 241920 (2005).
27De, F.M.F. Groot, Faber, J., Michiels, J.J.M., Czyzyk, M.T., Abbate, M., and Fuggle, J.C.: Oxygen 1s x-ray-absorption of tetravalent titanium-oxides–A comparison with single-particle calculations. Phys. Rev. B: Condens. Matter 48, 2074 (1993).
28Brydson, R., Sauer, H., Engel, W., and Hofer, F.: Electron energyloss near-edge structures at the oxygen K-edges of titanium(IV) oxygen compounds. J. Phys. Condens. Matter 4, 3429 (1992).
29Tanaka, I., Nakajima, T., Kawai, J., Adachi, H., Gu, H., and Ruhle, M.: Dopant-modified local chemical bonding at a grain boundary in SrTiO3. Philos. Mag. Lett. 75, 21 (1997).
30Mitterbauer, C.: Thesis, Graz University of Technology (2003).
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Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
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