Influence of grain distribution on the structural magnetic behavior of La0.67Sr0.33MnO3 nano-manganites.

Autor: Lim, K. P., Albert Gan, H. M., Halim, S. A., Chen, S. K., Talib, Z. A., Cheong, K. H., Ng, S. W., Chin, H. W.
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Zdroj: AIP Conference Proceedings; May2013, Vol. 1528 Issue 1, p99-103, 5p, 1 Black and White Photograph, 1 Diagram, 1 Chart, 3 Graphs
Abstrakt: Nano-size polycrystalline La0.67Sr0.33MnO3 was synthesized via co-precipitation (LSMO-CP) and sol-gel (LSMO-SG) method. X-ray diffraction (XRD) technique revealed that all the samples were trigonal crystal structure with space group of R-3c. Rietveld refinement analysis showed that elongation of c-axis and smaller a-b plane was observed in SG sample as compared with CP sample. Micrograph shows that all samples having grain size smaller than 1 μm. Higher coercivity and lower saturation magnetization were observed for SG sample which has smaller (∼100 nm) and narrower particle size distribution as compared to CP sample. This variation was believed to be due to the dead layer and domain effect. All prepared nano-size manganites are non-single domain particles and non-superparamagnetic (ferromagnetic) behavior. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index