Paper Title:
Fabrication and Properties of La-Manganite/SnO2 Composites
  Abstract

Composites with compositions La0.7Ca0.3MnO3(LCMO) and La0.7Sr0.3MnO3(LSMO)/SnO2 were prepared by a standard ceramic technique. The structure and morphology of the composites have been studied by the X-ray diffraction (XRD) and scanning electronic microscopy (SEM). The XRD and SEM results indicate that no reaction occurs between La based maganite and SnO2 grains, and that SnO2 segregates mostly at the grain boundaries of La based maganite. The variation in resistivity with temperature has been studied and shows a semiconducting behavior, furthermore the composites exhibit metallic percolation. It is interesting to note that an enhanced magnetoresisitance (MR) effect for the composites is found over a wide temperature range from low temperature to room temperature in an applied magnetic field of 0.5 Tesla. The spin-polarized tunneling and the spin-polarized tunneling may be attributed to the enhanced low-field magnetoresistance (LFMR) effect.

  Info
Periodical
Advanced Materials Research (Volumes 123-125)
Edited by
Joong Hee Lee
Pages
81-84
DOI
10.4028/www.scientific.net/AMR.123-125.81
Citation
G. W. Kim, Y. J. Seo, J. L. Bian, C. G. Lee, B. H. Koo, "Fabrication and Properties of La-Manganite/SnO2 Composites", Advanced Materials Research, Vols. 123-125, pp. 81-84, 2010
Online since
August 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Xiang Zhang, Yu Bao Li, Yi Zuo, Guo Yu Lv, Yuan Hua Mu
Abstract:The crystallization behavior of n-HA/PA66 biocomposites at different processing pressure and annealing temperature were investigated by XRD...
898
Authors: Ming Liang Luo, Qing Zhi Wen, Hong Jian Liu, Jia Lin Liu
Abstract:Sulfonated-polyethersulfone/TiO2 (SPES/TiO2) nanoparticle composites with different TiO2 content were prepared by a sol-gel process. These...
663
Authors: Zhen Yuan Li, Hao Ran Geng, Hai Ou Qin
Abstract:The Al-7%Si /9% Al63Cu25Fe12 composites were fabricated by mechanical stirring method. The composite took...
1022
Authors: Zhen Chen, Ye Mao Han, Min Zhou, Rong Jin Huang, Yuan Zhou, Lai Feng Li
Abstract:In the present study, the glass microsphere dispersed Bi-Sb thermoelectric materials have been fabricated through mechanical alloying...
120
Authors: Mi Dan Li, Yao Lu, Lu Lu Feng, Huan Niu, Ya Wen Kong
Chapter 2: Research on Materials,Mechanics and Technologies
Abstract:Composites made from phenolic resin are filled with conductive filler mixtures containing copper powders, natural graphite powders and carbon...
120