| 摘要 |
PROBLEM TO BE SOLVED: To provide a micro sensor capable of detecting a minute fluctuating magnetic field with high accuracy, and to provide its use. SOLUTION: This micro sensor comprises a coil-like carbon fiber 14 formed in a coil shape by carbon fiber, and an oscilloscope 16 capable of measuring an induced electromotive force V that is an AC voltage generated by electromagnetic induction of the coil-like carbon fiber 14 exposed to the fluctuating magnetic field. A diameter of the carbon fiber of the coil-like carbon fiber 14 is 1 nm-10μm and a diameter of the coil is at least 2 nm-100μm. By disposing the micro sensor in the fluctuating magnetic field, the AC induced electromotive force V is generated in the coil-like carbon fiber 14 exposed to the fluctuating magnetic field by the electromagnetic induction and is displayed on the oscilloscope 16 as an AC signal.
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