G - Physics – 01 – R
Patent
G - Physics
01
R
324/48
G01R 33/032 (2006.01) G02F 1/00 (2006.01)
Patent
CA 1203573
ABSTRACT OF THE DISCLOSURE A measuring instrument of magnetic field utilizing Faraday rotation is disclosed in which a medium exhibiting Faraday rotation includes at least one thin magnetic garnet film magnetized in a propagation direction of light and having a composition expressed by a general formula R3-xQx(Fe5-yMy)O12 (where R indicates at least one element selected from a group consisting of Y, La, Lu, Ca, Sm and Bi, Q indicates at least one element selected from a group consisting of Gd, Eu, Er, Tm, Tb, Yb, Ho and Dy, M is at least one element selected from a group consisting of Ga, Al, Ge, Si, Sc, Mn, In, V and Cr, the value of x lies in a rannge expressed by a formula 0.1 ? x ? 3.0, and the value of y lies in a range ex- pressed by a formula 0 ? y ? 1.5). According to this instrument, stable measured values are obtained inde- pendently of temperature variation.
420643
Katsuyama Toshio
Matsumura Hiroyoshi
Nagatsuma Kazuyuki
Ohta Norio
Suganuma Tsuneo
Hitachi Ltd.
Kirby Eades Gale Baker
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