EPR study of Fe3 in KTiOPO4 single crystals |
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| Authors: | Sang won Ahn Sung ho Choh Byung Chun Choi Jung Nam Kim |
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| Affiliation: |
a Department of Physics, Korea University, Seoul, Korea
b Department of Natural Sciences, Pusan National University of Technology, Pusan, Korea
c Department of Physics, Pusan National University, Pusan, Korea |
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| Abstract: | EPR measurement of Fe3+ in as-grown KTiOPO4 single crystals has been carried out at room temperature by employing a Bruker Q-band spectrometer. In addition to the centers ST2 and ST4 reported by Gaite et al, we have identified two extra Fe3+ centers having a mirror symmetry of ST2 and ST4, respectively. For all Fe3+ centers, parameters of the general spin Hamiltonian are calculated: the diagonal values of the second-order tensors and orientations of the principal axes are determined. The possible origin of the additional centers is discussed in terms of the local site symmetry at Fe3+ in KTiOPO4. |
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