A MAGNETIC BUBBLE DOMAIN DETECTOR

摘要

A magnetic bubble domain detector includes a coupled film sensor stripe (12) and an excitation conductor (20) which is electrically insulated from the stripe and interacts with the stripe (12) over a cross-over area (22). A sensor stripe consists of a pair of superpositioned Permalloy stripes (14, 16) which are separated by a thin nonmagnetic layer (18). A high frequency excitation current (19) in the conductor produces an inductive output signal in the sensor stripe. The waveform of this periodic signal is responsive to bubble domains proximate to the sensor/conductor crossover area (22).