Investigations on colour dependent photo induced microactuation effect of FSMA and proposing suitable mechanisms to control the effect
Three different coloured focused laser beams were used to study the photo induced microactuation effect found in some ferromagnetic shape memory alloys. Besides trying to uncover the basic causes of this unique and as yet unexplained effect, these studies are to help find other conditions to further characterize the effect for practical use. In this study some mechanisms have been proposed to control the amplitude of actuation of the sample. Control of the actuation of the FSMA sample both linearly with the help of a continuously variable neutral density filter as well periodically with the help of a linear polarizer was achieved. Statistical analysis of the experimental data was also done by applying ANOVA studies on the data to conclusively provide evidence in support of the relationship between the actuation of the sample and the various controlling factors. This study is expected to pave the way to implement this property of the sample in fabricating and operating useful micro-mechanical systems in the near future.
KeywordsFerromagnetic shape memory alloys Laser Polarization Microactuation Analysis of variance
PACS Nos.42.55.Px 42.62.Cf 68.35.bd 78.20.Ek
One of the authors, AB, would like to thank the Council of Scientific and Industrial Research, Govt. of India, for the grant of a senior research fellowship. He is also thankful to The Director, S. N. Bose Centre to allow him to work in this institute.