<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>We investigated electrical properties of nanostructured La1−x
                        SrxFeO3 (0 ≤ x ≤ 1) from 300 K–400 K. The nanostructured La1−x
                        SrxFeO3 (0 ≤ x ≤ 1) was synthesized by citrate gel method requiring no pH control. X-ray diffraction pattern showed that single phase LaFeO3 with an orthorhombic structure was formed. The structure changed into rhombohedral for x = 0.5 and it became cubic for x = 1.0. For x ≤ 0.5, our material showed non-linear current-voltage characteristics and for x > 0.5 it showed linear current-voltage characteristics. Poole Frenkel type conduction mechanism was found to be operative in LaFeO3 from 300 K–400 K. The experimental values of field-lowering coefficient were by 2.56–6.41 times higher than the predicted value and were attributed to the presence of localized fields. The increase in conductance with Sr content was due to formation of Fe4+ ions in addition to Fe3+ with the increase in Sr content. Impedance spectroscopy and ac conductivity analysis of La1−x
                        SrxFeO3 (0 ≤ x ≤ 1) was also carried out in the temperature range from 300 K–400 K and frequency was varied from 20 Hz - 2 MHz. The ac conduction followed the correlated barrier hopping model in La0.9Sr0.1FeO3.</p></abstract>

We investigated electrical properties of nanostructured La1−x
                        SrxFeO3 (0 ≤ x ≤ 1) from 300 K–400 K. The nanostructured La1−x
                        SrxFeO3 (0 ≤ x ≤ 1) was synthesized by citrate gel method requiring no pH control. X-ray diffraction pattern showed that single phase LaFeO3 with an orthorhombic structure was formed. The structure changed into rhombohedral for x = 0.5 and it became cubic for x = 1.0. For x ≤ 0.5, our material showed non-linear current-voltage characteristics and for x > 0.5 it showed linear current-voltage characteristics. Poole Frenkel type conduction mechanism was found to be operative in LaFeO3 from 300 K–400 K. The experimental values of field-lowering coefficient were by 2.56–6.41 times higher than the predicted value and were attributed to the presence of localized fields. The increase in conductance with Sr content was due to formation of Fe4+ ions in addition to Fe3+ with the increase in Sr content. Impedance spectroscopy and ac conductivity analysis of La1−x
                        SrxFeO3 (0 ≤ x ≤ 1) was also carried out in the temperature range from 300 K–400 K and frequency was varied from 20 Hz - 2 MHz. The ac conduction followed the correlated barrier hopping model in La0.9Sr0.1FeO3.

Conduction in nanostructured La1−x
                     SrxFeO3 (0 ≤ x ≤ 1)

Micro and Nano Devices Group, Department of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences, P.O. Nilore, Islamabad, 45650, Pakistan

TPPD, PINSTECH, P.O. Nilore, Islamabad, 45650, Pakistan

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

We investigated electrical properties of nanostructured La1−x
                        SrxFeO3 (0 ≤ x ≤ 1) from 300 K–400 K. The nanostructured La1−x
          ...

Conduction in nanostructured La1−x SrxFeO3 (0 ≤ x ≤ 1)

Publié en ligne: 14 sept. 2012

Pages: 240 - 247

DOI: https://doi.org/10.2478/s13536-012-0030-3

Mots clés
electrical properties, conduction, oxides, chemical synthesis

© 2012 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Conduction in nanostructured La1−x SrxFeO3 (0 ≤ x ≤ 1)

Publié en ligne: 14 sept. 2012

Pages: 240 - 247

DOI: https://doi.org/10.2478/s13536-012-0030-3

Mots cléselectrical properties, conduction, oxides, chemical synthesis

© 2012 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
electrical properties, conduction, oxides, chemical synthesis