Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-07-13
J. Phys. D 42, 175002-9 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
22 pages of Text + Figs:comments/suggestions(awana@mail.nplindia.ernet.in)
Scientific paper
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.
Agarwal Sujeet Kumar
Awana* V. P. S.
Bhalla G. L.
Habermier H. U.
Kishan Hari
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