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Colossal magnetoresistive manganite thin‐films for infrared detection and imaging
Author(s) -
Todd M.A.,
Donohue P.P.,
Wright P.J.,
Crosbie M.J.,
Lane P.A.,
Jo M.H.,
Pang B.S.H.,
Blamire M.G.
Publication year - 2004
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.200310042
Subject(s) - manganite , pseudogap , condensed matter physics , colossal magnetoresistance , magnetoresistance , doping , superconductivity , cuprate , seebeck coefficient , materials science , atmospheric temperature range , metal , high temperature superconductivity , physics , thermoelectric effect , magnetic field , ferromagnetism , thermodynamics , quantum mechanics , metallurgy
The sharp metal‐to‐insulator transition observed in several colossal magnetoresistive manganite (CMR) materials has led to interest in the use of CMR thin‐films as bolometric detectors of infrared radiation. We have confirmed that with optimum growth and processing conditions, both high TCR (up to 30%/K) and low excess noise properties can be achieved in pulsed‐laser deposited La 0.7 Ca 0.3 MnO 3 thin films. These offer unprecendented levels of performance if used as resistance bolometers, however a degree of cooling from room temperature will be required to achieve maximum bolometer performance. We have shown that La x Ba 1‐ x MnO 3 is a candidate for uncooled bolometer operation and demonstrated room‐temperature TCR values of 5%/K in both laser‐deposited and liquid‐delivery CVD deposited LBMO films. Further enhancement to these figures is expected with optimised processing.
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