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Enhanced Room Temperature Coefficient of Resistance and Magneto-resistance of Ag-added La0.7Ca0.3-xBaxMnO3 Composites

In this paper we report an enhanced temperature coefficient of resistance (TCR) close to room temperature in La0.7Ca0.3-xBaxMnO3 + Agy (x = 0.10, 0.15 and y = 0.0 to 0.40) (LCBMO+Ag) composite manganites. The observed enhancement of TCR is attributed to the grain growth and opening of new conducting channels in the composites. Ag addition has also been found to enhance intra-granular magneto-resistance. Inter-granular MR, however, is seen to decrease with Ag addition. The enhanced TCR and MR at / near room temperature open up the possibility of the use of such materials as infrared bolometric and magnetic field sensors respectively.

preprint2012arXivOpen access
Rahul TripathiV. P. S. AwanaNeeraj PanwarG. L. BhallaH. U. HabermierS. K. AgarwalH. Kishan
cond-mat.str-elcond-mat.mtrl-sci
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Open access7 authors2 topics
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Rahul TripathiV. P. S. AwanaNeeraj PanwarG. L. BhallaH. U. HabermierS. K. AgarwalH. Kishan

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