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Journal Articles physica status solidi (b) Year : 2014

Electron paramagnetic resonance of Fe3+ in gallium borate: Superposition model analysis

Abstract

A series of high quality FexGa1−xBO3 single crystals with 0 ≤ x ≤ 1 was prepared and studied by electron magnetic resonance in the temperature range from 4 to 290 K. At low x, only the electron paramagnetic resonance (EPR) of diluted Fe3+ ions is present. The EPR spectra for different orientations of the magnetizing field have been computer simulated. With a conventional spin Hamiltonian including the Zeeman and fine-structure terms, two different sets of best-fit parameters have been found. This ambiguity has been resolved on the basis of the general spin Hamiltonian with parameters determined from the crystallographic data using the Newman superposition model. A detailed fitting to the experimental EPR spectra assuming statistical distributions of Fe3+ ligand coordinates has revealed the existence of a certain degree of local disorder in FexGa1−xBO3 single crystals.
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Dates and versions

hal-01064076 , version 1 (26-02-2018)

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Attribution - NonCommercial

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Kira Seleznyova, Mark Strugatsky, Sergey Yagupov, Natalia Postivey, Alla Artemenko, et al.. Electron paramagnetic resonance of Fe3+ in gallium borate: Superposition model analysis. physica status solidi (b), 2014, 251 (7), pp.1393-1400. ⟨10.1002/pssb.201350359⟩. ⟨hal-01064076⟩
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