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

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

5256

Lastpage

5258

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-RuO_x; RuO_x 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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278805

Filename

278805