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Volume 21, Issue 4_1
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Contributed Paper
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M. Inoue, T. Fujii1997 Volume 21 Issue 4_1 Pages 187-192
Published: 1997
Released on J-STAGE: August 20, 2007
JOURNAL OPEN ACCESSThe magneto-optical (MO) Faraday effect of films with disordered multilayer structures was analyzed theoretically, using the random matrix approach. The films were composed by stacking bismuth-substituted yttrium iron garnet (Bi: YIG) layers and silicon dioxide (SiO2) layers in a disordered sequence. When the multilayer film has a disordered structure appropriate for supporting the lacalization of light, the Faraday rotation angle θF of the film is extraordinarily enlarged: for instance, at λ (wavelength of light) = 1.15 μm, θF increases by more than 6.0deg/μm, which is about 30 times more than the inherent value for the Bi: YIG single film (θF=0.2 deg/μm). This is considered to be a novel mechanism for enhancing the MO Faraday effect, and is very attractive for various MO applications, including optical communication and high-density MO recording.View full abstractDownload PDF (430K) -
T. Kawai, H. Saotome, Y. Sakaki1997 Volume 21 Issue 4_1 Pages 193-198
Published: 1997
Released on J-STAGE: August 20, 2007
JOURNAL OPEN ACCESSThis paper describes the power loss characteristics of Mn-Zn and Ni-Zn ferrite cores in the high-frequency range. Two kinds of Mn-Zn and an Ni-Zn ferrite material were used to verify the proposed magnetization model. To analyze the iron loss, we propose an equivalent circuit of ferrite cores, whose circuit elements are derived from measured material constants. Analysis of the power loss, showed that the dielectric loss and magnetic loss are dominant in the high-frequency region. Ferrite cores having a large relative permittivity have a considerable skin effect, which accounts for the complex frequency characteristics of the iron loss in Mn-Zn ferrites.View full abstractDownload PDF (420K)
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