The Static Characterization of Magnetic Bubble Films Using Spatial Filtering Techniques.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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The primary objectives of this study were to confirm the spatial filtering technique for the static characterization of 4 to 7 micrometers stripewidth magnetic bubble films, and to extend the technique to 1 to 3 micrometers stripewidth films. Also an objective was to determine the uncertainty in 4piMs value if infinite Q is assumed, when in fact a more modest value 3Q5 is present. The spatial filtering technique used the diffraction grating properties of a magnetic bubble film in conjunction with the equation of Kooy and Enz to determine stripewidth, characteristic length, and saturation magnetization. The spatial filter removes unwanted orders from the diffraction pattern. The filtered signal is focused on a photodetector and the first order diffraction angle measured to find stripewidth and the second order to find saturation magnetization. The Kooy and Enz equation were computer programmed and tables and plots of characteristic lengththickness and applied fieldsaturation magnetization prepared.
- Computer Programming and Software
- Computer Hardware
- Electricity and Magnetism