FIR optical properties of single crystal Ba-and Sr-hexaferrite |
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| Institution: | 1. School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454000, People''s Republic of China;2. Department of Physics and Lab of Correlated Electron System and Spintronic Devices, School of Physics, Hefei University of Technology, Hefei, Anhui 230009, People''s Republic of China |
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| Abstract: | Far-infrared reflectivity measurements on single crystal barium and strontium hexaferrite are presented. The infrared active TO, and the associated LO phonon frequencies and the dielectric permittivity functions for E ⊥c have been determined using a fitting procedure based on a four parameter model. The infrared active modes of these compounds (space group D46h have been determined by group theoretical analysis and the results compared with the spectroscopic measurements. |
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