A high frequency permeance meter for anisotropic films and its application in the determination of magneto striction constants

A new apparatus has been developed for the measurement of the permeance of thin magnetic film in the frequency range of 0.5 M to 100 MHz. The apparatus has a proportional accuracy of -10 to +20% and a low level resolution of 13 μm at 10 MHz. The accuracy of the new apparatus was confirmed and its frequency characteristics studied in experiments. The magneto striction constant determined with this meter is described in this report.