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http://dx.doi.org/10.4283/JKMS.2003.13.4.171

Electron Paramagnetic Resonance Study of impurity Fe3+ ion in LiTaO3 single crystal  

Min, S.G. (청주대학교 응용과학부)
Yeon, T.H. (청주대학교 응용과학부)
Lee, S.H. (청주대학교 응용과학부)
Lee, M.K. (연세대학교 신소재공학부)
Shin, H.K. (연세대학교 신소재공학부)
Yu, Y.M. (광주 광기술원)
Kim, T.H. (광주 광기술원)
Yu, S.C. (충북대학교 물리학과)
Abstract
Electron paramagnetic resonance (EPR) of Fe$^{3+}$ in LiTaO$_3$ single crystal, grown by Czochralski method, has been studied by employing an X-band spectrometer. Resonance spectra of Fe$^{3+}$ ion on the crystallographic principal axes were obtained with 9.447 ㎓ at room temperature. The spectroscopic splitting parameter g and zero-field splitting (ZFS) parameter D (= 3 B$_{2}$sup 0/) are calculated with effective spin Hamiltonian. Fe$^{3+}$ center in stoichometric single crystal turns out to be different with that in congruent single crystal reported previously. From the analysis of temperature dependence of resonance fields for Fe$^{3+}$ ion, there is no any phase transition at the temperature range (from -160 $^{\circ}C$ to 20 $^{\circ}C$).
Keywords
ferroelectrics; LiTaO$_3$ single crystal; electron paramagnetic resonance; zero field splitting;
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