Absorption and Reflectivity Measurements on Some Rare Earth Iron Garnets and α-Fe2O3
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- P. C. Bailey
- Magnetic Materials Development Section, Materials Engineering Departments, Westinghouse Electric Corporation, East Pittsburgh, Pennsylvania
書誌事項
- 公開日
- 1960-05-01
- DOI
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- 10.1063/1.1984595
- 公開者
- AIP Publishing
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説明
<jats:p>Measurements of the absorption coefficient of (111) crystal sections of α-Fe2O3 were made in the visible and near infrared. Absorption peaks were observed centered at energies of about 12000 cm−1 and 16000cm1. Reflectivity measurements on the α-Fe2O3 crystals were carried out in the 30000 cm−1 to 400 cm−1range. Broad reflectivity peaks are found in the near ultraviolet at 24500 cm−1 and 26000 cm−1, respectively. Very strong reflection peaks resulting from the lattice vibrations are present at energies smaller than 700 cm−1.</jats:p> <jats:p>Several quite sharp peaks are found in the absorption spectra of the rare-earth iron garnets of Dy, Ho,Er and Yb in the 10000 cm−1–13000 cm−1 energy range. The circular dichroism of ytterbium iron garnet is displayed by means of absorption curves for the two senses of circularly polarized light.</jats:p>
収録刊行物
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- Journal of Applied Physics
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Journal of Applied Physics 31 (5), S39-S40, 1960-05-01
AIP Publishing
