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Tip Induced Surface Defect migration and Conductivity Studies in Tetragonal, Rhombohedral and Mixed-Phase epitaxial BiFeO3 Thin Films

  • M M Saj Mohan (a1), M V Sreenath (a1) and Ranjith Ramadurai (a1)

Abstract

BiFeO3 (BFO) is the most studied room temperature multiferroic compound. In this work we demonstrate a template assisted growth process through which the growth strain is controlled to achieve required phase of BFO. Growth of (∼20nm) fully strained tetragonal (T), rhombohedral (R) and mixed phase of T and R of Bismuth ferrite (BiFeO3) was achieved by varying the thickness of the template layer. The different phases were confirmed by using high resolution x-ray diffractions studies. The conductivity map of all the three phases were carried out using an atomic force microscope operating in conductive mode. Tip induced surface defect migration within a given grain was observed in pure phases and the conductivity map confirmed the same. The room temperature resistivity is found to be decreasing systematically from 1.1×106 Ωm , 935×105 Ωm and 1.16×104 Ωm respectively for tetragonal, mixed phase and rhombohedral phase BFO. In the case of mixed phase both the nano- scale and macroscopic leakage current studies show low conductivity, which could be due to the increased pinning sites that increases the energy barrier for the defect migration. The local nano-scale measurements and conductivity mapping corroborates well with the macroscopic studies.

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1.Catalan, G., and Scott, J. F., Adv. Mater., 21, 24632485 (2009).
2.Wang, J., Neaton, J.B., Zheng, H., Nagarajan, V., Ogale, S.B., Liu, B., Viehland, D., Vaithyanathan, V., Schlom, D.G., V Waghmare, U., Spaldin, N.A., Rabe, K.M., Wuttig, M. and Ramesh, R., Science. 299, 17191722 (2003).
3.Christen, H.M., Nam, J.H., Kim, H.S., Hatt, A.J. and Spaldin, N.A.,, Phys. Rev B. 83, 144107 (2011).
4.Zeches, R.J., Rossell, M.D., Zhang, J.X., Hatt, A.J., He, Q., Yang, C.-H., Kumar, A., Wang, C.H., Melville, A., Adamo, C., Sheng, G., Chu, Y.-H., Ihlefeld, J.F., Erni, R., Ederer, C., Gopalan, V., Chen, L.Q., Schlom, D.G., Spaldin, N.A., Martin, L.W., and Ramesh, R., Science. 326 ,977 (2009).
5.Shin, Y.J., Jeon, B.C., Yang, S.M., Hwang, I., Cho, M.R., Sando, D., Lee, S.R., Yoon, J.-G., and Noh, T.W., Sci. Rep. 5, 10485 (2015).
6.Saj Mohan, M.M., Ramadurai, R. “Template Assisted Strain Tuning and Phase Stabilization in Epitaxial BiFeO3 Thin Films “ AIP conference proceedings presented at DAE SSPS 2017(under review).
7.Ionescu-Zanetti, C., and Mechler, A., European Microscopy and Analysis. 19, 911 (2005).
8.Shen, X., Yin, K., Puzyrev, Y.S., Liu, Y., Sun, L., Li, R.-W., and Pantelides, S.T., Adv. Electron. Mat. 1, 1500019 (2015).
9.Jyotsna, S., Arora, A., Sekhon, J.S., and Sheet, G., J. Appl. Phy.10, 116 (2014).
10.Ranjith, R, Prellier, W., Cheah, J., Wang, J., and Wu, T., Appl. Phys. Lett. 92, 232905 (2008).

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Tip Induced Surface Defect migration and Conductivity Studies in Tetragonal, Rhombohedral and Mixed-Phase epitaxial BiFeO3 Thin Films

  • M M Saj Mohan (a1), M V Sreenath (a1) and Ranjith Ramadurai (a1)

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