TY - JOUR
T1 - Electron paramagnetic resonance study of V4+-doped KTiOPO4 single crystals
AU - Kuo-Tung Liu, Liu
AU - Jiang-Tsu Yu, Yu
AU - Ssu-Hao Lou, Lou
AU - Chung-Hsien Lee, Lee
AU - Yutung Huang, Huang
AU - Kwang-Hwa Lii, Lii
PY - 1994/11
Y1 - 1994/11
N2 - Two chemically inequivalent V4+ ions with unequal populations were detected by electron paramagnetic resonance (EPR) in vanadium-doped KTiOPO4 crystals grown by a flux method. The EPR spectra of these two kinds of V4+ ions exhibit axial symmetry, with the symmetry axis almost coincident with the direction of the shortest Ti-O bond, namely, the Ti to a titanyl oxygen bond. These results allow one to identify the occupation sites of the doped V4+ ions and to conclude that the doped V4+ ions form two kinds of covalent bonds with the two chemically inequivalent titanyl oxygens, resulting in two chemically inequivalent VO2+ ions. The EPR linewidths of these two VO2+ ions doped into KTiOPO4 are narrow at room temperature. Moreover, superhyperfine structures due to phosphorus nuclei can be detected at room temperature. These characteristics make the VO2+ ions an excellent EPR spin probe for quality control of KTiOPO4 single crystals.
AB - Two chemically inequivalent V4+ ions with unequal populations were detected by electron paramagnetic resonance (EPR) in vanadium-doped KTiOPO4 crystals grown by a flux method. The EPR spectra of these two kinds of V4+ ions exhibit axial symmetry, with the symmetry axis almost coincident with the direction of the shortest Ti-O bond, namely, the Ti to a titanyl oxygen bond. These results allow one to identify the occupation sites of the doped V4+ ions and to conclude that the doped V4+ ions form two kinds of covalent bonds with the two chemically inequivalent titanyl oxygens, resulting in two chemically inequivalent VO2+ ions. The EPR linewidths of these two VO2+ ions doped into KTiOPO4 are narrow at room temperature. Moreover, superhyperfine structures due to phosphorus nuclei can be detected at room temperature. These characteristics make the VO2+ ions an excellent EPR spin probe for quality control of KTiOPO4 single crystals.
KW - A. optical materials
KW - D. defects
KW - D. electron paramagnetic resonance (EPR)
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U2 - 10.1016/0022-3697(94)90202-X
DO - 10.1016/0022-3697(94)90202-X
M3 - Article
AN - SCOPUS:0028550724
SN - 0022-3697
VL - 55
SP - 1221
EP - 1226
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 11
ER -