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A high-frequency Kerr-effect microscope for bubble devices

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3 Author(s)
Harrison, C.G. ; IBM General Products Div., San Jose, CA, USA ; Huswitzer, R.B. ; Voge, J.B.

A Kerr-effect microscope is described which has been assembled specifically for studies of the dynamic magnetization of the Permalloy elements of magnetic-bubble memory devices at frequencies up to 300 kHz with an illumination spot size of approximately 2 μm. Procedures are described for the setting up and alignment of the microscope and for the calibration of the rotating field.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:IM-30 ,  Issue: 3 )