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http://dx.doi.org/10.4283/JKMS.2003.13.5.204

Electron Magnetic Resonance Study of Paramagnetic Impurities in LiTaO3 and LiMbO3 Single Crystals  

Yeom, Tae-Ho (청주대학교 이공대학 응용과학부)
Abstract
Electron magnetic resonance (EMR) of paramagnetic Cr$^{3+}$, Mn$^{2+}$, and Fe$^{3+}$ impurity ions in ferroelectric LiNbO$_3$ and LiTaO$_3$ single crystals has been studied. The actual sites location of paramagnetic impurity ions in the crystals was suggested from the experimental results and zero field splitting parameters calculated by superposition model. It turns out that Cr$^{3+}$ ions in LiNbO$_3$ crystal have two resonance centers and enter both the Li$^{+}$ and Nb$^{5+}$ ions. Mn$^{2+}$ and Fe$^{3+}$ impurity ions in LiNbO$_3$ substitute for Nb$^{5+}$ ions. However, both Cr$^{3+}$ and Fe$^{3+}$ ions in LiTaO$_3$ crystal reside at Li$^{+}$ ions.$ +/ ions.+/ ions.
Keywords
LiN$bO_3$ crystal; LiT$aO_3$ crystal; electron magnetic resonance; substitutional sites location;
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