Structural, Magnetic and Magnetotransport Properties of Sol-Gel Synthesized La0.67Ca0.33MnO3:TiO2 Nanocomposite

Colossal magnetoresistive (CMR) materials have been widely studied because of their huge potential in spintronic technology. An introduction of secondary phase to the manganite matrix is able to improve the low field magnetoresistance (LFMR). This method is favoured by recent research works as it re...

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Published inSolid state phenomena Vol. 307; pp. 9 - 14
Main Authors Kechik, Mohd Mustafa Awang, Ibrahim, Noor Baayah, Pah, Lim Kean, Chen, Soo Kien, Halim, Shaari Abdul, Lau, Lik Nguong, Lai, Sin Yin
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 01.07.2020
Subjects
Crystal structure
Magnetic properties
Magnetism
Magnetometers
Magnetoresistance
Magnetoresistivity
Manganites
Memory devices
Nanocomposites
Polycrystals
Room temperature
Sol-gel processes
Synthesis
Titanium dioxide
Transport properties
Rietveld Refinement
LCMO
Manganite Composite
Spintronic
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Summary:Colossal magnetoresistive (CMR) materials have been widely studied because of their huge potential in spintronic technology. An introduction of secondary phase to the manganite matrix is able to improve the low field magnetoresistance (LFMR). This method is favoured by recent research works as it requires a lower magnetic field compared to intrinsic magnetoresistance. Structural, magnetic properties and magnetotransport properties of polycrystalline (1-x) La0.67Ca0.33MnO3 (LCMO): x TiO2 composites where x = 0.00, 0.05, 0.10, 0.15 and 0.20 were investigated in this work. Polycrystalline La0.67Ca0.33MnO3 (LCMO) was synthesized via sol-gel method and pre-sintered at 800 °C before appending with nano-sized TiO2. All samples are in LCMO phase having an orthorhombic structure with space group Pnma. The crystal structural parameter is studied by using Rietveld refinement. As TiO2 content increases, the magnetization is getting higher as observed via vibrating sample magnetometer (VSM) analysis at room temperature. Magnetotransport properties of the pure LCMO sample have been studied from 80 – 220 K. The LFMR is enhanced as the temperature drops. The results have shown LCMO: TiO2 manganite composite is an excellent candidate for future magnetic sensors and memory devices.
Bibliography:Special topic volume with invited peer-reviewed papers only
ISSN:1012-0394
1662-9779
1662-9779
DOI:10.4028/www.scientific.net/SSP.307.9