In:
Communications in Physics, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 18, No. 1 ( 2008-07-18), p. 48-57
Abstract:
In this study we report the effect of sintering temperature on the low field magnetoresistance (LFMR) of La0.7Ca0.3MnO3 manganite synthesized through sol-gel technique. The La0.7Ca0.3MnO3 has been sintered at 600°C, 700°C, 800°C, 900°C and 1200°C. The crystallite as well as particle size also show strong dependence on the sintering temperature. While the ferromagnetic – paramagnetic (FM-PM) transition temperature remains almost constant, the metal – insulation transition temperature drop gradual and the low field magnetoresistance (LFMR) increase with a decrease in grain size. We have analyzed our data based on the spin – polarized transport of conduction electrons at the grain boundaries.
Type of Medium:
Online Resource
ISSN:
0868-3166
,
0868-3166
DOI:
10.15625/0868-3166-18-1
DOI:
10.15625/0868-3166/18/1/247
Language:
Unknown
Publisher:
Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
Publication Date:
2008
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