Abstract
Impurity Fe3+ ion electron spin resonance (ESR) spectroscopy using multiple dielectric modes in a SrTiO3 dielectric resonator has been performed with a tunable DC magnetic field of up to 1.6 T. The Ti-4 +(d(0)) ion is substituted by Fe3+ ion forming FeO6 octahedral complex with an iron-oxygen-vacancy (Fe3+- V-O). In such a metal-ligand complex, a giant g-factor of g(parallel to F) = 5.51 was observed in the ferroelectric phase at 20 mK. The change of Fe3+ ion center-symmetry in the FeO6 complex as a soft-mode characteristics of ferroelectric phase transition and the influences of iron-oxygen-vacancy (Fe3+- V-O), are interactively sensitive to asymmetry in the octahedral rotational parameter Phi in SrTiO3 .
Original language | English |
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Article number | 295805 |
Number of pages | 6 |
Journal | Journal of Physics-Condensed Matter |
Volume | 30 |
Issue number | 29 |
DOIs | |
Publication status | Published - 28 Jun 2018 |