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Evaluation of manganite films on silicon for uncooled bolometric applications

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9 Author(s)
Choudhary, R.J. ; Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742 ; Ogale, Anjali S. ; Shinde, S.R. ; Hullavarad, S.
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Pulsed-laser-deposited polycrystalline/amorphous films of mixed-valent manganites [La0.7Ca0.3MnO3 (LCMO), La0.5Sr0.5MnO3 (LSMO), La0.5Ba0.5MnO3 (LBMO), and (La0.6Pr0.4)0.67Ca0.33MnO3 (LPCMO)] grown at low temperature (450 °C) on single crystal (001) silicon substrate are evaluated for uncooled bolometric applications. It is shown that the temperature coefficient of resistance (TCR) and electrical noise (Sv) depend on the chemical composition. The optimum performance is found for LCMO with TCR of ∼7% K-1 and spectral noise ∼8.9×10-13 V2/Hz. In LBMO and LSMO the noise is much lower, but so is the TCR (1.5%–2% K-1). In LPCMO the TCR is high (∼10% K-1) and the noise is as well. © 2004 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:84 ,  Issue: 19 )

Date of Publication:

May 2004

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