[14a-P2-1~13] 3.8 Optical measurement, instrumentation, and sensor

[14a-P2-7] Magneto-optical Cavity Effect on Magnetic Multilayers for Hydrogen Gas Sensing

〇Haruki Yamane¹, Hiroshi Yamasaki², Ken Sumiyoshi², Koji Shigemura² (1.Akita Ind. Tech., 2.NLT Tech., Ltd.)

Keywords:magneto-optical effect, hydrogen gas sensor, magnetic stacked film

Hydrogen gas sensing by a magneto-optical (MO) effect was investigated on [hydrogen reactive/MO interference/reflection metal] multilayered films. A huge MO Kerr rotation angle over 10 degrees was obtained by MO interference (cavity) effect. The exposing of 4% H₂/N₂ mixture gas reduced the Kerr angle about 3 degrees.