UPM Institutional Repository

Grain size effect on electrical and magnetotransport properties of La0.67Ca0.33MnO3 synthesized via sol-gel method


Lim, Kean Pah and Shaari, Abdul Halim and Chen, Soo Kien and Awang Kechik, Mohd Mustafa and Ng, Siau Wei and Wan Jusoh, Wan Nur Wathiq (2018) Grain size effect on electrical and magnetotransport properties of La0.67Ca0.33MnO3 synthesized via sol-gel method. IOP Conference Series: Journal of Physics: Conference Series, 1083 (1). pp. 1-9. ISSN 1742-6588; ESSN: 1742-6596


The effect of grain size on electrical resistivity and magnetoresistance (MR) effect on La0.67Ca0.33MnO3 prepared via sol-gel method was reported with different sintering temperature starting from 600°C to 1200°C. X-ray diffraction (XRD) patterns show that La0.67Ca0.33MnO3 was in single phase and had orthorhombic structure with space group Pbnm (62). The crystallite size as well as particle size show strong dependence on sintering temperature (Ts). The metal-insulator transition (TMI) and the magnitude of magnetoresistance are significantly influenced by the effective grain boundaries in LCMO polycrystalline. The TMI and its resistivity increases as the grain size and crystallite size increases (Ts increase). The highest low-field magnetoresistance (LFMR), which extrinsic percentage of MR is more dominant, observed in LC-SG8 (-12.89%) with nano-sized distribution that showing double crystallite structure. However, the highest CMR is found in LC-SG10 (-23.48%) at 80 K with 1 Tesla. These percentage variations of MR for all samples were influenced by the grain size and crystallite size variations which consequently affect the spin polarized-tunneling scattering at the grain boundary layer.

Download File

[img] Text
Grain size effect on electrical .pdf

Download (7kB)

Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1088/1742-6596/1083/1/012059
Publisher: IOP Publishing
Notes: The International Conference of Solid State Science and Technology (ICSSST 2017)
Keywords: Grain size; Electrical; Magnetotransport properties; Sol-gel method
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 17 Mar 2021 04:07
Last Modified: 17 Mar 2021 04:07
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1088/1742-6596/1083/1/012059
URI: http://psasir.upm.edu.my/id/eprint/72858
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item