Publication date: 14 August 2026
Source: Materials Science Forum Vol. 1199
Author(s): Samee Azad, Durga Gajula, Makhluk Hossain Prio, Goutam Koley
The impact of periodic mechanical vibration on the phase transitional property of VO2 based thermal sensing thin film synthesized on AT-cut quartz has been investigated in this paper. VO2 were found to go through phase transition due to effect of heat, and display reduction of film resistivity and transmitted infrared power at a specific transition temperature, typically around 60-70°C. But sometimes the transmitted infrared power has been observed to decrease at a significantly lower temperature compared to the similar phenomenon for resistivity reduction. In order to correctly validate the transition temperature, the derivative of the transmitted optical power signal is measured, and it has been found that this measurement is experimentally possible when the VO2 film is subjected to a moderate to high frequency periodic mechanical vibration. It has also been observed that the variation of the mechanical vibration frequency has a direct effect on the derivative signal, which indicates the sharpness of the phase transition and magnitude of change of the transmitted infrared power depending on the width of the extrema lobe of the derivative.
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