Electron spin relaxation studies of impurity iron ions in ferroelectric lithium niobate |
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| Authors: | S K Date W Keune U Gonser |
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| Institution: | (1) Fachbereich Angewandte Physik, Universitat des Saarlandes, D66 Saarbrucken, Germany;(2) Present address: Chemical Physics Group, Tata Institute of Fundamental Research, 400 005 Bombay, India;(3) Present address: Fachbereich 6, Laboratorium fur Angewandte Physik, Gesamthochschule, Duisburg, D41 Duisburg, Germany |
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| Abstract: | The nuclear hyperfine structure of dilute impurity iron ions in ferroelectric lithium niobate is investigated via57Fe Mössbauer effect (ME). The ME spectra exhibit typical slow electron spin relaxation effects associated with Fe3+ ions in the6S5/2 state, which are analysed using spin-Hamiltonian formalism. For Fe3+ ions, the principal axis of EFG tensor is found to be parallel to the crystallographic c-axis. The strong external magnetic field of 47 KOe is used to study magnetic and crystal field effects on the ME hyperfine structure. |
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