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Title: Studies on the structural, electrical and magnetic properties of LaCrO{sub 3}, LaCr{sub 0.5}Cu{sub 0.5}O{sub 3} and LaCr{sub 0.5}Fe{sub 0.5}O{sub 3} by sol–gel method

Abstract

Highlights: ► LaCr{sub 0.5}M{sub 0.5}O{sub 3} (M = Cr{sup 3+}, Cu{sup 2+} and Fe{sup 3+}) was synthesized by simple sol–gel technique with subsequent heat treatment. ► The compound formation temperature was optimized through XRD analysis. ► The effects of Cu{sup 2+} and Fe{sup 3+} on the electrical properties of LaCrO{sub 3} were studied using impedance spectroscopy. ► The temperature dependence of electrical conductivity was discussed for LaCr{sub 0.5}Cu{sub 0.5}O{sub 3}. ► The magnetization was found to be enhanced in the LaCr{sub 0.5}Fe{sub 0.5}O{sub 3}. -- Abstract: The structural, electrical and magnetic properties of LaCr{sub 0.5}M{sub 0.5}O{sub 3} (M = Cr{sup 3+}, Cu{sup 2+} and Fe{sup 3+}) synthesized by a sol–gel technique were studied. The X-ray diffraction pattern shows the structure to be orthorhombic and the size of the particles is around 100 nm as seen from the TEM images. The effects of Cu{sup 2+} and Fe{sup 3+} on the electrical properties of LaCrO{sub 3} were studied using impedance spectroscopy at room temperature (RT). The properties of LaCr{sub 0.5}Cu{sub 0.5}O{sub 3} were studied over a wide range of temperature from RT to 533 K. A maximum conductivity of 1.7 × 10{sup −3} S cm{sup −1} was observed for LaCr{sub 0.5}Cu{sub 0.5}O{submore » 3} at a measured temperature of 533 K. The impedance spectra indicate a negative temperature coefficient of resistance (NTCR) and also imply the conduction is through bulk of the material. The magnetic studies performed using a SQUID magnetometer interpret the antiferromagnetically ordered LaCrO{sub 3} to behave ferromagnetically on the addition of Cu{sup 2+} and Fe{sup 3+}, and the magnetization was found to be enhanced in the LaCr{sub 0.5}Fe{sub 0.5}O{sub 3}.« less

Authors:
; ;  [1];  [2]; ;  [3]
  1. Solid State Ionics and Energy Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore 641 046 (India)
  2. School of Physics, Alagappa University, Karaikudi 630 003 (India)
  3. Bar-Ilan Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900 (Israel)
Publication Date:
OSTI Identifier:
22215162
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 8; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHROMIUM IONS; COPPER IONS; DIELECTRIC PROPERTIES; ELECTRIC CONDUCTIVITY; IRON IONS; MAGNETIC PROPERTIES; MAGNETIZATION; ORTHORHOMBIC LATTICES; SPECTROSCOPY; SQUID DEVICES; TEMPERATURE COEFFICIENT; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION

Citation Formats

Nithya, V. D., Jacob Immanuel, R., Senthilkumar, S. T., Sanjeeviraja, C., Perelshtein, I., Zitoun, D., and Kalai Selvan, R., E-mail: selvankram@buc.edu.in. Studies on the structural, electrical and magnetic properties of LaCrO{sub 3}, LaCr{sub 0.5}Cu{sub 0.5}O{sub 3} and LaCr{sub 0.5}Fe{sub 0.5}O{sub 3} by sol–gel method. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.04.068.
Nithya, V. D., Jacob Immanuel, R., Senthilkumar, S. T., Sanjeeviraja, C., Perelshtein, I., Zitoun, D., & Kalai Selvan, R., E-mail: selvankram@buc.edu.in. Studies on the structural, electrical and magnetic properties of LaCrO{sub 3}, LaCr{sub 0.5}Cu{sub 0.5}O{sub 3} and LaCr{sub 0.5}Fe{sub 0.5}O{sub 3} by sol–gel method. United States. https://doi.org/10.1016/J.MATERRESBULL.2012.04.068
Nithya, V. D., Jacob Immanuel, R., Senthilkumar, S. T., Sanjeeviraja, C., Perelshtein, I., Zitoun, D., and Kalai Selvan, R., E-mail: selvankram@buc.edu.in. 2012. "Studies on the structural, electrical and magnetic properties of LaCrO{sub 3}, LaCr{sub 0.5}Cu{sub 0.5}O{sub 3} and LaCr{sub 0.5}Fe{sub 0.5}O{sub 3} by sol–gel method". United States. https://doi.org/10.1016/J.MATERRESBULL.2012.04.068.
@article{osti_22215162,
title = {Studies on the structural, electrical and magnetic properties of LaCrO{sub 3}, LaCr{sub 0.5}Cu{sub 0.5}O{sub 3} and LaCr{sub 0.5}Fe{sub 0.5}O{sub 3} by sol–gel method},
author = {Nithya, V. D. and Jacob Immanuel, R. and Senthilkumar, S. T. and Sanjeeviraja, C. and Perelshtein, I. and Zitoun, D. and Kalai Selvan, R., E-mail: selvankram@buc.edu.in},
abstractNote = {Highlights: ► LaCr{sub 0.5}M{sub 0.5}O{sub 3} (M = Cr{sup 3+}, Cu{sup 2+} and Fe{sup 3+}) was synthesized by simple sol–gel technique with subsequent heat treatment. ► The compound formation temperature was optimized through XRD analysis. ► The effects of Cu{sup 2+} and Fe{sup 3+} on the electrical properties of LaCrO{sub 3} were studied using impedance spectroscopy. ► The temperature dependence of electrical conductivity was discussed for LaCr{sub 0.5}Cu{sub 0.5}O{sub 3}. ► The magnetization was found to be enhanced in the LaCr{sub 0.5}Fe{sub 0.5}O{sub 3}. -- Abstract: The structural, electrical and magnetic properties of LaCr{sub 0.5}M{sub 0.5}O{sub 3} (M = Cr{sup 3+}, Cu{sup 2+} and Fe{sup 3+}) synthesized by a sol–gel technique were studied. The X-ray diffraction pattern shows the structure to be orthorhombic and the size of the particles is around 100 nm as seen from the TEM images. The effects of Cu{sup 2+} and Fe{sup 3+} on the electrical properties of LaCrO{sub 3} were studied using impedance spectroscopy at room temperature (RT). The properties of LaCr{sub 0.5}Cu{sub 0.5}O{sub 3} were studied over a wide range of temperature from RT to 533 K. A maximum conductivity of 1.7 × 10{sup −3} S cm{sup −1} was observed for LaCr{sub 0.5}Cu{sub 0.5}O{sub 3} at a measured temperature of 533 K. The impedance spectra indicate a negative temperature coefficient of resistance (NTCR) and also imply the conduction is through bulk of the material. The magnetic studies performed using a SQUID magnetometer interpret the antiferromagnetically ordered LaCrO{sub 3} to behave ferromagnetically on the addition of Cu{sup 2+} and Fe{sup 3+}, and the magnetization was found to be enhanced in the LaCr{sub 0.5}Fe{sub 0.5}O{sub 3}.},
doi = {10.1016/J.MATERRESBULL.2012.04.068},
url = {https://www.osti.gov/biblio/22215162}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 8,
volume = 47,
place = {United States},
year = {Wed Aug 15 00:00:00 EDT 2012},
month = {Wed Aug 15 00:00:00 EDT 2012}
}