Domain wall conductivity in La-doped BiFeO3

Seidel, J. and Maksymovych, P. and Batra, Y. and Katan, A. and Yang, S. and He, Q. and Baddorf, A.P. and Kalinin, S.V. and Yang, C. and Yang, J. and Chu, Y. and Salje, E. K. H. and Wormeester, H. and Salmeron, M. and Ramesh, R. (2010) Domain wall conductivity in La-doped BiFeO3. Physical Review Letters, 105 (19). p. 197603. DOI 10.1103/PhysRevLett.105.197603

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Abstract

The transport physics of domain wall conductivity in La-doped bismuth ferrite (BiFeO3) has been probed using variable temperature conducting atomic force microscopy and piezoresponse force microscopy in samples with arrays of domain walls in the as-grown state. Nanoscale current measurements are investigated as a function of bias and temperature and are shown to be consistent with distinct electronic properties at the domain walls leading to changes in the observed local conductivity. Our observation is well described within a band picture of the observed electronic conduction. Finally, we demonstrate an additional degree of control of the wall conductivity through chemical doping with oxygen vacancies, thus influencing the local conductive state.

Item Type: Article
Uncontrolled Keywords: 2010AREP;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Physical Review Letters
Volume: 105
Page Range: p. 197603
Identification Number: 10.1103/PhysRevLett.105.197603
Depositing User: Sarah Humbert
Date Deposited: 05 Apr 2012 15:05
Last Modified: 23 Jul 2013 10:03
URI: http://eprints.esc.cam.ac.uk/id/eprint/2450

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