New optical technique for bulk magnetostriction measurement
作者： H Samata , Y Nagata , T Uchida , S Abe
DOI: 10.1016/S0304-8853(99)00832-X
关键词:
摘要: A new optical technique was applied to the measurement of magnetostriction in bulk samples. This utilizes an "ber bundle, AC-modulated light and lock-in detection. Deformation sample is determined from ratio incident re#ected intensities. Noise due instability source eliminated by obtaining intensities, noise caused detector circuit can be reduced The performance this method characterized with a series measurements using gold "lm crystal disks pure iron nickel. o!ers resolution 0.5 nm sensitive enough measure as small 5]10~7 1 mm thick ( 2000 Elsevier Science B.V. All rights reserved.
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