Citation
Lim, Kean Pah and Shaari, Abdul Halim and Chen , Soo Kien and S., W. Ng and J., K. Wong and Tan, Kar Ban
(2009)
Low-field magnetoresistive and magnetic properties in (La1-xErx)0.67Sr0.33MnO3 manganites perovskite.
Solid State Science and Technology, 17 (2).
pp. 220-225.
ISSN 0128-7389
Abstract
Polycrystalline manganites of (La1-xErx)0.67Sr0.33MnO3 (x=0.00, 0.05 and 0.10) had been prepared by conventional solid-state reaction method. X-ray diffraction analysis
confirms that all samples are in single phase with distorted perovskite rhombohedral structure. Scanning electron microscope shows that small amount of Er substitution in La site affect the grain formation and this might affect the grain boundaries layer which resulting the reduction of Tc. All sample shows quite similar Low-field
magnetoresistance (MR) effect with a large negative MR at low field (0-0.1T) region followed by a slower varying MR at high field (0.1-1T) region. The highest low-field
MR value of -3% (at 0.1T, 300K) and high-field MR value of -8.3% (at 1T, 300K) are observed for sample X=0.10.
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