|About this Abstract
||Materials Science & Technology 2011
||Solution-Based Processing for Ceramic Materials
||Spin Sprayed Nickel Copper Manganite Films for Thermal Imaging
||Song Won Ko, Jing Li, Myoung-yun Lee, Thomas Jackson, Nikolas Podraza, Elizabeth Dickey, Susan Trolier-McKinstry
|On-Site Speaker (Planned)
||Song Won Ko
Thermistor films with negative temperature coefficient like VOx, a-Si, and NiMn2O4 are used as a detector in microbolometers and infrared sensors. These materials should have large TCR, low resistivity, and low noise. Nickel manganite films have large TCR (>–3%/K) and good environmental stability. However, the resistivity is high and the noise hasn’t been reported. In this work, the electrical properties and noise of nickel copper manganite films were investigated. To improve the ability to prepare manganite spinels on pre-existing circuitry, the spin spray technique was adopted. As grown nickel manganite film deposited at a substrate temperature of 90oC showed nanocrystalline spinel phase. The temperature coefficient of resistance of nickel copper manganite film was around -2.9 %/K and the resistivity was less than 1000 Ω-cm. The normalized Hooge parameter was about 1.7×10-21cm3.