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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Korolev, K.A. Shu Chen Afsar, M.N. |
| Copyright Year | 2007 |
| Description | Author affiliation: Tufts Univ., Medford (Korolev, K.A.; Shu Chen; Afsar, M.N.) |
| Abstract | Transmittance measurements on 99.9% pure yttrium iron garnets, aluminum-substituted yttrium iron garnets, gadolinium-substituted yttrium iron garnets and nickel ferrite ceramics over a broad-band millimeter wave frequency range have been performed. The measurements have been done using a free-space, quasi optical millimeter wave spectrometer in transverse magnetic field up to 8 kOe. Magneto-optical approach has been successfully employed for the separation of dielectric and magnetic effects, so that complex magnetic permeability and dielectric permittivity of ferrite materials can be determined simultaneously. Changes in magnetic permeability in transverse magnetic field due to the shift of ferromagnetic resonance to higher frequencies have been observed. Magnetic anisotropy and dissipation parameters have been calculated using Schloemann equation for partly magnetized ferrites. A high Q-factor Fabry-Perot open resonator system has also been employed for precise complex dielectric permittivity measurements of pure yttrium iron garnets and gadolinium substituted samples. A comparison of measured data and the measurement accuracy for both free-space quasi-optical technique and Fabry-Perot open resonator system have been performed. |
| Starting Page | 1 |
| Ending Page | 5 |
| File Size | 2202624 |
| Page Count | 5 |
| File Format | |
| ISBN | 1424405882 |
| ISSN | 10915281 |
| DOI | 10.1109/IMTC.2007.379139 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-05-01 |
| Publisher Place | Poland |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Magnetic variables measurement Ferrites Ceramics Millimeter wave measurements Dielectric measurements Magnetic field measurement Yttrium Iron Garnets Permittivity measurement permittivity ferrites millimeter wave measurements magneto-optics permeability |
| Content Type | Text |
| Resource Type | Article |
| Subject | Instrumentation Electrical and Electronic Engineering |
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