Abstract: MnO$-2$/ thin films have been prepared by thermal evaporation technique onto glass substrate at varying deposition pressure. Electrical studies of the films deposited at about 1.5 $MUL 10$+$MIN@5$/ Torr show a positive TCR indicating metallic characteristics, whereas a negative TCR indicating semiconducting behavior exhibit on the films deposited at a pressure of about 3.0 $MUL 10$+$MIN@6$/ Torr. Thickness dependent electrical conductivity, activation energy, and aging effect were also carried out. Optical measurements in the wavelength range 0.3 $LS $lambda $LS 2.5 $mu@m show the films highly transparent in the visible. These studies may be of importance for the application of this material in surface coating for energy efficient devices. !19
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机译：摘要：在不同的沉积压力下，通过热蒸发技术在玻璃基板上制备了MnO $ -2 $ /薄膜。对以约1.5 $ MUL 10 $ + $ MIN @ 5 $ / Torr沉积的薄膜进行的电学研究表明，在金属薄膜上的正TCR表示金属特性，而在约3.0 $ MUL 10的压力下沉积的薄膜显示出半导电性，表示半导体性能$ + $ MIN @ 6 $ / Torr。还进行了厚度依赖性的电导率，活化能和老化效果。在波长范围0.3 $ LS $λ$ LS 2.5 $ mu @ m的光学测量结果表明，这些膜在可见光中具有很高的透明度。这些研究对于这种材料在节能设备的表面涂层中的应用可能很重要。 ！19
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