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Fiber-optical magnetic field sensors based on Faraday effect in new materials

Magnetic materials with high Faraday effect were studied for fiber—optic magnetic fields and electric currents sensors design. Different compositions of semimagnetic semiconductors were grown to measure high frequency magnetic fields (up to several GHz). For moderate frequency sensors < 50 MHz the most perspective material was found to be Bi-substituted yttrium—iron gamete . Several ways to achieve high sensitivity and wide frequency band are discussed. Sensors on the basis of the investigated materials for various spheres of applications were constructed.