Nanodomain induced anomalous magnetic and electronic transport properties of LaBaCo2O5.5δ highly epitaxial thin films

F. Ruiz-Zepeda, C. Ma, D. Bahena Uribe, J. Cantu-Valle, H. Wang, Xing Xu, M. J. Yacaman, C. Chen, B. Lorenz, A. J. Jacobson, P. C.W. Chu, A. Ponce

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6 Citations (Scopus)

Abstract

A giant magnetoresistance effect (∼46 at 20 K under 7 T) and anomalous magnetic properties were found in a highly epitaxial double perovskite LaBaCo2O5.5δ (LBCO) thin film on (001) MgO. Aberration-corrected Electron Microscopy and related analytical techniques were employed to understand the nature of these unusual physical properties. The as-grown film is epitaxial with the c-axis of the LBCO structure lying in the film plane and with an interface relationship given by (100)LBCO || (001)MgO and [001]LBCO || [100]MgO or [010]MgO. Orderly oxygen vacancies were observed by line profile electron energy loss spectroscopy and by atomic resolution imaging. Especially, oxygen vacancy and nanodomain structures were found to have a crucial effect on the electronic transport and magnetic properties.

Original languageEnglish
Article number024301
JournalJournal of Applied Physics
Volume115
Issue number2
DOIs
Publication statusPublished - 2014 Jan 14

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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