| 摘要 |
PROBLEM TO BE SOLVED: To provide a Faraday rotator which does not require an external magnetic field applying means for saturating magnetization of a Faraday rotator, is excellent in durability for an external disturbing magnetic field and moreover is inexpensive. SOLUTION: A magnetic body 2 having a Faraday effect has a garnet crystal structure and has a uniaxial magnetic anisotropy originated from a magnetic elastic effect, wherein the extent of the uniaxially magnetic anisotropic energy is large as compared to a crystal magnetic anisotropic constant. The easy axis direction of magnetization of the magnetic body 2 is substantially parallel to the propagation direction 3 of light propagated through an inner part of the Faraday rotator and a coercive force in the easy axis direction of magnetization is 500 Oe or more. COPYRIGHT: (C)2008,JPO&INPIT
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