| Autor: |
Bykov, I.P., Glinchuk, M.D., Laguta, V.V., Nokhrin, S.N., Jastrabik, L., Smotrakov, V., Eremkin, V., Hrabovsky, M. |
| Předmět: |
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| Zdroj: |
Ferroelectrics; Aug2002, Vol. 272 Issue 1, p167-172, 6p |
| Abstrakt: |
Measurements of ESR spectra in PbZr 1-x Ti x O 3 , x ≤ 0,06, single crystals were performed at T = (10 ÷ 40) K before and after UV light illumination. Unavoidable impurities Fe 3+ , Pt 3+ , Ni 3+ and Ti 3+ were revealed respectively before and after light illumination. The components of orthorhombic symmetry g-tensor and its principal axes orientation were obtained from measurements of the spectra angular dependencies. It was shown that all paramagnetic ions substitute for Zr 4+ either in the center of oxygen octahedron (Pt 3+ , Ni 3+ , Fe 3+ ) or in off-center shifted along c-axis direction position (Ti 3+ ). Local distortion of oxygen octahedra was shown to be close to that in pure PbZrO 3 . Low symmetry of PZT and PbZrO 3 lattices manifest itself respectively in 8 and 4 magnetically nonequivalent positions of the paramagnetic ions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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