| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic sensor mechanism and a rotation state detection device using this magnetic sensor mechanism which can detect a magnetic field direction (impression direction of an external magnetic field) in spite of simple constitution, and can also detect directly the magnetic field direction under the state that the change of magnetic field direction is stopped. SOLUTION: The magnetic sensor mechanism 1 for detecting the state of a magnetic field, comprising a surface (surface S<SB>1</SB>of a detecting body 4) containing a metal nitride layer (for example, Fe<SB>4</SB>N thin film 12 which is a Fe<SB>4</SB>N layer), a luminescent part 2 which irradiates this surface S<SB>1</SB>, and a light-receiving section 3 which receives a catoptric light 6b that is the reflected light from this luminescent part 2 by the surface S<SB>1</SB>, detects the direction of a magnetic field (magnetic-field-directions H' of external magnetic field H) from the intensity of the catoptric light 6b. COPYRIGHT: (C)2005,JPO&NCIPI
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