Orientation dependence of ferroelectric behavior of BiFeO{sub 3} thin films

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3261841· OSTI ID:21361936

Jiagang, Wu; Wang, John ^[1]

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1. Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117574 (Singapore)

Multiferroic BiFeO{sub 3} (BFO) thin films with (111), (100), (110) preferred, and random orientations were deposited by radio frequency magnetron sputtering on SrRuO{sub 3}-buffered SrTiO{sub 3}(111), SrTiO{sub 3}(100), SrTiO{sub 3}(110), and Pt(111)/Ti/SiO{sub 2}/Si(100) substrates, respectively. The orientation dependences of ferroelectric and fatigue behavior of the BFO thin films were investigated. As expected, the (111)-oriented BFO thin film exhibits the highest, giant ferroelectric polarization (2P{sub r}=196.9 muC/cm{sup 2}) at 1 kHz and room temperature using positive up negative down measurement, while the (100)-oriented BFO thin film possesses an almost fatigue-free behavior up to 5.25x10{sup 7} switching cycles when measured at 100 kHz and room temperature. The observed behavior confirms that the largest spontaneous polarization direction and the fatigue endurance are (111) and (100) for BFO thin films, respectively. Regardless of the film orientation, the charge carriers that are responsible for dielectric relaxation and conductivity are oxygen vacancies (V{sub O}) .

• OSTI ID: 21361936
• Journal Information: Journal of Applied Physics, Vol. 106, Issue 10; Other Information: DOI: 10.1063/1.3261841; (c) 2009 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
CHARGE CARRIERS
CRYSTALS
DEPOSITION
ELECTRIC CONDUCTIVITY
FATIGUE
FERROELECTRIC MATERIALS
KHZ RANGE 01-100
OXYGEN
POLARIZATION
RADIOWAVE RADIATION
RELAXATION
SILICON OXIDES
SPUTTERING
STRONTIUM TITANATES
SUBSTRATES
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
VACANCIES
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIELECTRIC MATERIALS
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
FILMS
FREQUENCY RANGE
KHZ RANGE
MATERIALS
MECHANICAL PROPERTIES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
RADIATIONS
SILICON COMPOUNDS
STRONTIUM COMPOUNDS
TEMPERATURE RANGE
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS