期刊
MEASUREMENT SCIENCE AND TECHNOLOGY
卷 33, 期 6, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6501/ac5c93
关键词
magnetic Ni nanofilms; Kerr rotation angle; mean field theory; characteristic matrix method; magneto-optic Kerr effect
资金
- National Natural Science Foundation of China [61973132]
- Key Project of Hubei Province [2020BHB020, 2021ACB001]
- Interdisciplinary Program of Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology [WHMFC202103]
Thermometry is crucial in laboratory and industry settings. We propose a noninvasive temperature measurement method based on the superparamagnetic properties of nickel-plated films. This method combines magnetic and optical physical quantities to increase the penetration and amount of information in temperature measurement.
Thermometry is essential in laboratory and industry settings. We propose a noninvasive temperature measurement method based on the superparamagnetic properties of nickel-plated films. When the nickel (Ni) film is uniformly heated from 100 K to 300 K, we observe that the polarization angle of the reflected polarized light decreases correspondingly. Compared with optical temperature measurement, this method introduces magnetic physical quantity, which increases the penetration of temperature measurement. Compared with magnetic temperature measurement, this method introduces optical physical quantity, which greatly increases the amount of information contained in the measurement channel. On this basis, we introduce the characteristic matrix of membrane system, and the improved the mean field theory which can interpret superparamagnetism. Our experiment has demonstrated that the above theoretical model is feasible from low temperature to normal temperature. The thin film sensor element provides the necessary temperature information for cryogenic wind tunnel design and hypersonic vehicle surface model design in real time
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