Synthesizes and electrical transport properties of (La0.7-xNdx) Ca0.3MnO3 with substitutions of (x=0.00, 0.05, 0.10, 0.15 AND 0.20) / Tuan Zulkifli Tuan Mohd.

Tuan Mohd, Tuan Zulkifli (2010) Synthesizes and electrical transport properties of (La0.7-xNdx) Ca0.3MnO3 with substitutions of (x=0.00, 0.05, 0.10, 0.15 AND 0.20) / Tuan Zulkifli Tuan Mohd. [Student Project] (Unpublished)

Abstract

CMR material with nominal composition (La0.7-xNdx) Ca0.3MnO3 (x=0.00-0.20) were synthesize and it's electrical and structure properties were investigated by the conventional solid state reaction method. All the data is collected by using four point probe and XRD. The result showed metal - insulator temperature TMI is shifted to lower temperature and the resistivity is increased by increasing the portion of Neodymium (Nd) substitution but interesting characteristic are displayed by x=0.15 and 0.20 the resistivity of both sample is drop drastically and the phenomenon is expected due to the properties of Nd . On the metallic region all samples are fitted well with combination of electron-electron and electron- magnon. The deceasing in the resistivity is suggested due to weaken of double exchange mechanism (DE). Existence of Nd into the perovskite had influence the bonding angle of Mn-O-Mn. ℮g electron on the Mn3+ can not move to Mn4+ easily. From the data obtained and the previous study the structure of all samples is in orthorhombic, where a ≠ b ≠ c.

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Item Type: Student Project
Creators:
Creators
Email / ID Num.
Tuan Mohd, Tuan Zulkifli
UNSPECIFIED
Contributors:
Contribution
Name
Email / ID Num.
Thesis advisor
Mohamed, Zakiah
UNSPECIFIED
Subjects: Q Science > QC Physics > Electricity and magnetism
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Applied Sciences
Programme: Bachelor of Science (Hons.) Industrial Physics
Keywords: Nominal composition, Orthorhombic, Transport properties
Date: 2010
URI: https://ir.uitm.edu.my/id/eprint/45484
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