SELEZNYOVA, Kira; STRUGATSKY, Mark; YAGUPOV, Sergey; POSTIVEY, Natalia; ARTEMENKO, Alla; KLIAVA, Janis

doi:10.1002/pssb.201350359

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SELEZNYOVA, Kira
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Physics Faculty (TNU)

STRUGATSKY, Mark
Physics Faculty (TNU)

YAGUPOV, Sergey
Physics Faculty (TNU)

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Article de revue

Ce document a été publié dans

physica status solidi (b). 2014, vol. 251, n° 7, p. 1393-1400

Wiley

Résumé en anglais

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.< Réduire

Mots clés en anglais

Fe 3þ electron paramagnetic resonance

gallium borate

spin Hamiltonian

superposition model

Mots clés en italien

Fe3+ electron paramagnetic resonance