High temperature electrical properties study of Sr{sub 2}(Fe,Ti)O{sub 6} double perovskite materials using impedance spectroscopy method

Journal Article · Tue Apr 19 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4946925· OSTI ID:22606701

Laysandra, Heidi ^[1]

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1. Department of Physics, FMIPA, Universitas Indonesia, Kampus UI Depok (Indonesia)

The structure, thermal, and electrical properties of double perovskite material Sr{sub 2}(Fe,Ti)O{sub 6} at high temperature have been studied. This material was synthesized by a solid state reaction method. X-ray diffraction characterization at room temperature for all samples shows a single phase and having a structure of cubic double perovskite with Pm3m space group. The variation of Fe and Ti atoms are seen in an increasing of lattice parameter and grain size which is found between 30 nm and 80 nm. The electrical properties as a function of temperature and frequency are characterized by using RLC-meter with impedance spectroscopy method. The impedance data are presented in Nyquist and Bode plot resulting in the equivalent circuit and its parameters. The equivalent circuit shows the effect of grain and grain boundary in the electrical properties of materials. DC conductivity of Sr{sub 2}(Fe,Ti)O{sub 6} as a function of temperature was explained by using Arrhenius equation. The value of the activation energy which is evaluated from dc conductivity as a function of temperature shows the effect of grain and grain boundary. The activation energy exhibits of oxygen vacancy in Sr{sub 2}(Fe,Ti)O{sub 6} which is also supported by morphology of Sr{sub 2}(Fe,Ti)O{sub 6} is characterized by field emission scanning electron microscopy (FESEM).

• OSTI ID: 22606701
• Journal Information: AIP Conference Proceedings, Vol. 1729, Issue 1; Conference: ISCPMS 2015: 1. international symposium on current progress in mathematics and sciences, Depok (Indonesia), 3-4 Nov 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
ARRHENIUS EQUATION
CUBIC LATTICES
ELECTRICAL PROPERTIES
ELECTRON SCANNING
FIELD EMISSION
GRAIN BOUNDARIES
GRAIN SIZE
IMPEDANCE
IRON COMPOUNDS
LATTICE PARAMETERS
OXYGEN COMPOUNDS
PEROVSKITE
SCANNING ELECTRON MICROSCOPY
SPECTROSCOPY
STRONTIUM COMPOUNDS
TEMPERATURE DEPENDENCE
TITANIUM COMPOUNDS
X RADIATION
X-RAY DIFFRACTION