Nanodomain induced anomalous magnetic and electronic transport properties of LaBaCo{sub 2}O{sub 5.5+δ} highly epitaxial thin films

Journal Article · Tue Jan 14 00:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4861406· OSTI ID:22271268

Ruiz-Zepeda, F.; Ma, C.; Bahena Uribe, D.; Cantu-Valle, J.; Wang, H.; Xu, Xing; Yacaman, M. J.; Chen, C. ^[1]; Lorenz, B.; Jacobson, A. J.; Chu, P. C. W. ^[2]

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1. Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249 (United States)
2. The Texas Center for Superconductivity, University of Houston, Houston, Texas 77204 (United States)

A giant magnetoresistance effect (∼46% at 20 K under 7 T) and anomalous magnetic properties were found in a highly epitaxial double perovskite LaBaCo{sub 2}O{sub 5.5+δ} (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){sub LBCO} || (001){sub MgO} and [001]{sub LBCO} || [100]{sub MgO} or [010]{sub 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.

• OSTI ID: 22271268
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
COBALT OXIDES
CUBIC LATTICES
ELECTRON MICROSCOPY
ELECTRONS
ENERGY-LOSS SPECTROSCOPY
EPITAXY
INTERFACES
LANTHANUM COMPOUNDS
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
MAGNETORESISTANCE
OXYGEN
TEMPERATURE DEPENDENCE
THIN FILMS
VACANCIES