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http://dx.doi.org/10.4283/JKMS.2005.15.3.177

Thermal Effects on Stoichiometric LiTaO3 Single Crystal  

Yeom, T.H. (Department of Physics, Cheongju)
Lee, S.H. (Department of Physics, Cheongju)
Publication Information
Journal of the Korean Magnetics Society / v.15, no.3, 2005 , pp. 177-180 More about this Journal
Abstract
Ferroelectric $LiTaO_3$ single crystals, grown by the Czochralski method, were thermally treated at temperature $1000^{\circ}C\;and\;1100^{\circ}C$. Electron paramagnetic resonance (EPR) study of stoichiometric $LiTaO_3$ and thermally treated $LiTaO_3$ crystals has been investigated by employing an X-band spectrometer. From the $Fe^{3+}$ EPR spectra, it turned out that there is no change of site location and local site symmetry around $Fe^{3+}$ impurity ion between stoichiometric and thermally treated $LiTaO_3$ single crystals. We confirmed that the ionic state of $Fe^{3+}$ ion changed after thermal treatment. The EPR parameters of $Fe^{3+}$ ion in $LiTaO_3$ single crystals are determined with effective spin Hamiltonian.
Keywords
EPR; paramagnetic impurity ion; ferroelectrics; thermal treatment;
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