Title :
A new improved (YbTbBi)3Fe5O12 epitaxial thick film
Author :
Nakajima, K. ; Nomi, Y. ; Ishikawa, H. ; Machida, K.
Author_Institution :
Sumitomo Metal Min. Co. Ltd., Tokyo, Japan
fDate :
11/1/1988 12:00:00 AM
Abstract :
The Faraday rotation coefficient of a (YbTbBi)3Fe5 O12 thick films grown by liquid phase epitaxy (LPE) on a (CaGd)3(MgZrGa)5O12 substrate was found to be -2400 and -1600 deg/cm at λ=1.31 and 1.55 μm, respectively. This is believed to be the largest Faraday rotation coefficient exhibited by an LPE-grown thick film of Bi-substituted rare-earth iron garnets for Faraday rotators in practical use. The thickness required to achieve 45° rotation was only 190 μm for λ=1.31 μm and 290 μm for λ=1.55 μm. The film could be successfully grown to about 300 μm without crack formation. The Faraday rotator using this material has a low insertion loss, 0.3 dB for λ=1.31 μm and 0.2 dB for λ=1.55 μm, and isolation of about 40 dB
Keywords :
Faraday effect; garnets; liquid phase epitaxial growth; magnetic epitaxial layers; magneto-optical recording; 0.2 to 0.3 dB; 1.31 micron; 1.55 micron; 190 micron; 290 micron; 40 dB; CaCdGGMg5O12Zr5O12; CaCdGa5O12Mg5O12Zr5O12; Faraday rotation coefficient; Faraday rotators; LPE; YbTbBiFe5O12; YbTbBiIG; epitaxial thick film; garnets; insertion loss; isolation; liquid phase epitaxy; thickness; Bismuth; Garnets; Iron; Isolators; Magnetic materials; Optical devices; Optical films; Optical materials; Substrates; Thick films;
Journal_Title :
Magnetics, IEEE Transactions on
