| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 101 === This research main studied how the magnetostriction of ferromagnetic ribbons show in AC field. Then, the ribbons sustained the field annealed at 150 ℃、250 ℃、350 ℃ different temperature which the field was 50 Oe, and there magnetic properties will investigated by Vibration Sample magnetometer. In this study, we used two kind of the commercial ribbons, Metglas® 2605SA1、2826MB. By using Scanning Electron Microscope-Energy Dispersive Spectrometer we know the component ratio of Fe and Si were 10:1 in 2605SA1. The coercive force of the ribbons will slightly decreased, but there were no obvious anisotropy existed in the ribbons at the ribbon’s direction 0°and 90°after field annealing. The resistance of 2605SA1 ribbon is 125.4 μΩcm. The measurement of magnetostriction show the resonance is the main factor caused the magnetostriction of ribbon increased when the driving frequency went larger. Vertical magnetostriction and parallel magnetostriction is in-phase process at low frequency, and they has small phase difference between the field. The phase difference will increased at high frequency because of the eddy current’s effect. In Fourier Transform analysis, magnetostriction is the even function of the field at low driving frequency, but the same situation did not appear in high driving frequency. Compared the field driven by sinusoidal wave and triangle wave, we know that there result did not have much different.
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