Physics – Condensed Matter – Materials Science
Scientific paper
2005-04-22
Physics
Condensed Matter
Materials Science
23 pages, 9 figures, submitted to J. Mag. Magn. Materials
Scientific paper
A detailed investigation of the effect of PMMA on the structure, microstructure and magneto-transport properties of manganite La_0.7Ca_0.3MnO_3 (LCMO) is presented. LCMO-PMMA nanostructured composites have been synthesized by a unique polymeric sol-gel route, which leads to improved solubility of PMMA in the LCMO matrix. The LCMO phase is grown in the presence of varying PMMA concentration at ~500 ^0 C. This route yields single phase material and the grain size is observed to decrease slightly with increasing PMMA concentration. On increasing the PMMA concentration, T_C undergoes a small decrease, resistivity is observed to increase by two orders of magnitude, with a concomitant large decrease in T_IM, e.g., from 218 K for virgin LCMO to 108 K for 50 wt% PMMA admixed LCMO. Low field magneto-resistance measured in the temperature range 77-300 K shows considerable enhancement as a function of the PMMA concentration. These phenomena are explained by taking into account the increased intergranular disorder as a consequence of PMMA admixture.
Kataria N. D.
Kumar Jitendra
Singh Hemant Kumar
Singh Rajiv K.
Singh Ramadhar
No associations
LandOfFree
Low field magneto-transport in La_0.7Ca_0.3MnO_3-PMMA composites synthesized by polymeric precursor route does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Low field magneto-transport in La_0.7Ca_0.3MnO_3-PMMA composites synthesized by polymeric precursor route, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low field magneto-transport in La_0.7Ca_0.3MnO_3-PMMA composites synthesized by polymeric precursor route will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-611139