Nanodomain induced anomalous magnetic and electronic transport properties of LaBaCo2O5.5+δ highly epitaxial thin films.
作者： F. Ruiz-Zepeda , C. Ma , D. Bahena Uribe , J. Cantu-Valle , H. Wang
DOI: 10.1063/1.4861406
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摘要: A giant magnetoresistance effect (∼46% at 20 K under 7 T) and anomalous magnetic properties were found in a highly epitaxial double perovskite LaBaCo2O5.5+δ (LBCO) thin film on (001) MgO. Aberration-corrected Electron Microscopy related analytical techniques employed to understand the nature of these unusual physical properties. The as-grown is with c-axis LBCO structure lying plane an interface relationship given by (100)LBCO || (001)MgO [001]LBCO [100]MgO or [010]MgO. Orderly oxygen vacancies observed line profile electron energy loss spectroscopy atomic resolution imaging. Especially, vacancy nanodomain structures have crucial electronic transport
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