Saturation magnetostriction measurements of magnetic thin films under high magnetic fields |
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Authors: | Tetsuroh Kawai Mitsuru OhtakeMasaaki Futamoto |
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Affiliation: | Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan |
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Abstract: | Saturation magnetostriction measurements of magnetic thin films have been studied using a system equipped with a motor driven electromagnet and a laser displacement meter. A new method to reduce the errors caused by applied rotating magnetic field is proposed for high-sensitive and accurate measurements of saturation magnetostriction. It is shown that accurate measurements are possible for magnetic fields up to around 1 kOe, by extracting the 2nd harmonic output through Fourier analysis as a function of applied rotating magnetic field and then by taking the extrapolation of 2nd harmonic output to zero magnetic field. This method is applied to measure a saturation magnetostriction of single-crystal fcc-Co(111) film and the value of − 30 × 10− 6 is obtained. |
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Keywords: | Magnetostriction Saturation magnetostriction Magnetic thin film fcc-Co |
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