Temperature measurement based on the magneto-optic Kerr effect in Ni nanofilms

被引:4
|
作者
Yi, Wentong [1 ,5 ]
Zhu, Yiwen [1 ,5 ]
Hou, De [2 ,3 ]
Ning, Guoqiang [2 ,3 ]
Sheng, Zhigao [2 ]
Du, Zhongzhou [4 ]
Liu, Wenzhong [1 ,5 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Artificial Intelligence & Automat, Wuhan 430074, Peoples R China
[2] Chinese Acad Sci, Anhui Key Lab Condensed Matter Phys Extreme Condi, High Magnet Field Lab, HFIPS, Hefei 230031, Anhui, Peoples R China
[3] Univ Sci & Technol China, Hefei 230026, Peoples R China
[4] Zhengzhou Univ Light Ind, Sch Comp & Commun Engn, Zhengzhou 450002, Peoples R China
[5] Huazhong Univ Sci & Technol, China Belt & Rd Joint Lab Measurement & Control T, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
magnetic Ni nanofilms; Kerr rotation angle; mean field theory; characteristic matrix method; magneto-optic Kerr effect; MEAN-FIELD ANALYSIS; THIN-FILM; MAGNETIZATION;
D O I
10.1088/1361-6501/ac5c93
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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
引用
收藏
页数:11
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