Title :
Photo-magnetic semiconductor using pyromagnetic effect
Author :
Seki, K. ; Takahashi, T. ; Shida, J. ; Matsuki, H. ; Murakami, K.
Author_Institution :
Dept. of Electr. Eng., Iwate Univ., Morioka, Japan
fDate :
11/1/1991 12:00:00 AM
Abstract :
A photomagnetic semiconductor (PMS), composed of a thick film magnetic semiconductor and a radiant flux absorbent, is described. The PMS with a thickness of 55 μm is made of a ferrite powder and a ruthenium compound and its surface is painted with a radiant flux absorbent. The PMS is a pyromagnetic film utilizing the temperature dependence of the magnetic reluctance. When visible rays are radiated to the PMS, the radiant flux absorbent captures the light energy and transfers thermal energy to the magnetic semiconductor, which causes the reluctance change of the PMS. Therefore, the PMS acts as a nonwinding photomagnetic transducer. The PMS is suitable for use as a photosensor, a photorelay, a photochopper, or an exposure meter
Keywords :
copper compounds; ferrites; magnetic semiconductors; manganese compounds; photodetectors; photomagnetic effect; ruthenium compounds; thermomagnetic effects; thick films; MnCuFe2O4 powder; MnCuFe2O4-RuOx; RuOx paste; exposure meter; magnetic reluctance; nonwinding photomagnetic transducer; photochopper; photomagnetic semiconductor; photorelay; photosensor; pyromagnetic effect; radiant flux absorbent; temperature dependence; thick film magnetic semiconductor; Energy capture; Ferrite films; Magnetic films; Magnetic flux; Magnetic semiconductors; Powders; Semiconductor films; Temperature dependence; Thick films; Transducers;
Journal_Title :
Magnetics, IEEE Transactions on
