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叙述了磁泡石榴石外延膜破灭场的一种新的测量方法,给样品加一垂直直流场和一个正弦交流场,检测磁泡破灭时光电信号输出突变到最小值来测量,这就避免了直观法测量的人为误差和测量的繁琐性。文中还给出了测量装置细节和结果比较,与直观法测量相差在1%以内。
A new measuring method for bubble burst field of garnet epitaxial film is described. A vertical DC field and a sinusoidal AC field are added to the sample to measure the sudden drop of the photoelectric signal output when the bubble burst. This avoids Man-made errors and measurement cumbersomeness of intuitive methods. The article also gives the details of the measuring device and the results of the comparison, and the visual method of measurement within 1% difference.