Colossal Magnetoresistance of (La1-xDyx)0.67Sr0.33MnO3 Perovskite

Lim, Kean Pah and Abdul Halim, Shaari and Lee, Oon Jew and Yahya, Noorhana (2007) Colossal Magnetoresistance of (La1-xDyx)0.67Sr0.33MnO3 Perovskite. Journal of Sustainability of Science and Management, 2 (1). pp. 28-31. ISSN 1823-8556

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Official URL: http://journal.umt.edu.my/doc/Jun2007.pdf

Abstract

In this work, collasal magnetoresistance (CMR) of (La1-xDyx)0.67Sr0.33MnO3 ceramic, with x=0.00, 0.20 and 0.40 were prepared using the solid-state reaction technique. The structures, surface profile, magnetic and electrical properties of the samples axhibit single phase rhombohedral distorted perovskite tructures, which were caused by the Jahn-Teller distortion. Atomic Force Microscopy (AFM) analysis showed no significant change of grain size when Dy was substituted in La site. Magnetization analysis showed that Tc drop as the substitution concentration increased. The highest CMR value of 24.3% and 16.6% at 100K and 300K was observed in sample with x = 0.4 at 1 Tesla. Low field magnetoresistance effect had been observed for x = 0.00 and x= 0.20 sample. However, at high substitution concentration (x=0.40) LFMR effect tend to vanish.

Item Type:Article
Keyword:colossal magnetoresistance (CMR), perovskite
Faculty or Institute:Faculty of Science
Publisher:UMT Publisher
ID Code:10840
Deposited By: Najwani Amir Sariffudin
Deposited On:17 Mar 2011 02:39
Last Modified:17 Mar 2011 02:41

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