Low-noise La0.7Sr0.3MnO3 thermometers for uncooled bolometric applications

作者: Fan Yang , Laurence Méchin , Jean-Marc Routoure , Bruno Guillet , Radoslav A Chakalov

DOI: 10.1063/1.2159546

关键词: Materials scienceTemperature coefficientSubstrate (electronics)OptoelectronicsSemiconductorResistance thermometerElectrical resistivity and conductivityNuclear magnetic resonanceNoise (radio)Thin filmNoise-equivalent temperature

摘要: We report measurements of the temperature coefficient resistance (TCR) and low-frequency noise epitaxial La0.7Sr0.3MnO3 (LSMO) thin films deposited on SrTiO3 (STO) (LaAlO3)0.3(Sr2AlTaO6)0.7 substrates. An x-ray-diffraction study showed that were (001) oriented. A normalized Hooge parameter 9×10−31m3 was measured at 300K in case a 10‐μm-wide, 575‐μm-long line patterned 200‐nm-thick film grown STO substrate. This value is among lowest reported values for manganites close to standard metals semiconductors. The corresponding equivalent (NET) constant 300–340K range equal 6×10−7KHz−1∕2 10Hz 150μA LSMO film. very low NET comparable best published results even found be lower than other uncooled thermometers such as amorphous semiconductors, vanadium oxides, or semiconductin...

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