Anisotropy of permittivity of the hexagonal multiferroic HoMnO3 in the spectral range 0.6–5.0 eV
| Autor: | A. M. Balbashov, L. V. Nomerovannaya, A. A. Makhnev |
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| Rok vydání: | 2011 |
| Předmět: |
Permittivity
Materials science Condensed matter physics business.industry Second-harmonic generation Condensed Matter Physics Manganite Spectral line Electronic Optical and Magnetic Materials Optics Absorption edge Computer Science::Systems and Control Absorption band Anisotropy business Single crystal |
| Zdroj: | Physics of the Solid State. 53:105-108 |
| ISSN: | 1090-6460 1063-7834 |
| Popis: | The anisotropy of the optical properties of a single crystal of the hexagonal manganite HoMnO3 has been investigated by spectroscopic ellipsometry in the spectral range 0.6–5.0 eV. It has been demonstrated that the optical absorption edge for the polarization E ⊥ c is determined by the intense narrow transition O(2p) → Mn(3d) centered at 1.5 eV, whereas this transition for the polarization E ‖ c is strongly suppressed and shifted toward higher energies by 0.2 eV. It has been revealed that, at the temperature T = 293 K, the spectra for both polarizations E ‖ c and E ⊥ c exhibit a broad absorption band centered at ∼2.4 eV, which was earlier observed in nonlinear spectra during optical second harmonic generation. |
| Databáze: | OpenAIRE |
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