Magnetoimpedance of cobalt-coated silicon steels |
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Authors: | Chitnarong SirisathitkulSomkane Piromrak Pongsakorn Jantaratana |
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Institution: | a Magnet Laboratory, Molecular Technology Research Unit, Walailak University, Nakhon Si Thammarat 80160, Thailand b Department of Physics, Kasetsart University, Bangkok 10900, Thailand |
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Abstract: | Magnetoimpedance (MI) effect of cobalt-coated silicon steels is measured as a function of cobalt thickness (0−45 μm), DC magnetic field (0-2 kOe), frequency (1 kHz-1 MHz) and magnitude (1-20 mA) of AC current. With increase in deposition thickness, the MI ratio and the characteristic frequency are decreased because the samples are magnetically hardened by the coating. Nevertheless, cobalt deposition broadens the frequency-dependent MI curves, and the frequency range with a large MI ratio is extended. The variations of this peak width as well as the characteristic frequency and the MI ratio are explained by the skin effect and crossing effect. |
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Keywords: | Crossing effect Electrodeposition Magnetoimpedance effect Silicon steels Skin effect |
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