Title :
Magnetic field sensors using Ce:YIG single crystals as a Faraday element
Author :
Kamada, Osamu ; Higuchi, Sadao
Author_Institution :
Dept. of Electron. Eng., Polytech.. Univ., Kanagawa, Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
Magnetic field sensors based on creation of the Faraday effect by rotation magnetization in Ce:YIG crystals are studied. The large linear magnetic birefringence (LMB) of Δn=-1.7×10-4 was observed in the Ce0.18Y2.82Fe5O12 crystal and it was found from both the calculation and experimental investigations that the LMB affects the linearity of the sensor output. The validity of the method of utilizing a pair of Ce:YIG crystals with an azimuthal angle of 90 deg in the optical axis is demonstrated as a method of improving these phenomena
Keywords :
Faraday effect; cerium; garnets; magnetic field measurement; magneto-optical sensors; yttrium compounds; Ce0.18Y2.82Fe5O12; Cotton-Mouton effect; Faraday effect; Jones matrix; YFe5O12:Ce; YIG:Ce; angular dependence; compensation effect; doped garnet single crystals; large linear magnetic birefringence; magnetic field sensors; rotation magnetization; sensor output linearity; Azimuthal angle; Birefringence; Crystals; Faraday effect; Iron; Linearity; Magnetic sensors; Magnetization; Optical sensors; Sensor phenomena and characterization;
Journal_Title :
Magnetics, IEEE Transactions on
