Rigorous ESR spectroscopy of Fe3+ impurity ion with oxygen vacancy in ferroelectric SrTiO3 crystal at 20 mK. (28th June 2018)

• Record Type: Journal Article
• Authors: Hosain, M A; Le Floch, J-M; Krupka, J; Tobar, M E
• Is Part Of: Journal of physics. Volume 30:Number 29(2018)
• Publication Date: 2018-06-28
• Subjects: ferroelectric anisotropy -- electron spin resonance -- ion center symmetry -- quantum-hybrid system -- spin-Hamilton parameters -- impurity paramagnetic ions -- iron-oxygen vacancy; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aacc05
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Impurity Fe 3+ 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 ion is substituted by Fe 3+ ion forming FeO6 octahedral complex with an iron-oxygen-vacancy (Fe ). In such a metal-ligand complex, a giant g -factor of was observed in the ferroelectric phase at 20 mK. The change of Fe 3+ ion center-symmetry in the FeO6 complex as a soft-mode characteristics of ferroelectric phase transition and the influences of iron-oxygen-vacancy (Fe ), are interactively sensitive to asymmetry in the octahedral rotational parameter Φ in SrTiO3 .