Electron Paramagnetic Resonance Spectra of Ti3O5 Crystals

EPR spectra have been recorded at 77 °K on Ti3O5, crystals which were found to be twinned by X‐ray characterization. The spectra show several weak lines and two intense lines with anisotropic g‐factors. The presence of the two main lines has been attributed to the twinning. The line intensity corres...

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Veröffentlicht in:physica status solidi (b) 1972-11, Vol.54 (1), p.247-252
Hauptverfasser: Schlenker, C., Buder, R., Schlenker, M., Houlihan, J. F., Mulay, L. N.
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container_title physica status solidi (b)
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creator Schlenker, C.
Buder, R.
Schlenker, M.
Houlihan, J. F.
Mulay, L. N.
description EPR spectra have been recorded at 77 °K on Ti3O5, crystals which were found to be twinned by X‐ray characterization. The spectra show several weak lines and two intense lines with anisotropic g‐factors. The presence of the two main lines has been attributed to the twinning. The line intensity corresponds to a spin concentration of the order of 10−4 of the Ti3+ ions. The spectra are believed to be due to Ti2+ ions and related to the breaking of some covalent metal‐metal bonds involving the localization of come 3d electrons on one of the three different Ti sites. The line anisotropy has been ascribed to the distorted octahedral crystal field. On présente les spectres de résonance paramagnétique électronique obtenus sup des cristaux de Ti3O5. Une étude aux rayons X a montré que ces cristaux sont maclés. On observe sur ces spectres plusieurs raies peu intenses et 2 raies de forte intensityé, ayant des facteurs g anisotropes. On attribue l'existence des 2 raies intenses au maclage des cristaux. L'intensité des raies correspond à une valeur de l'ordre de pour le rapport du nombre de spins à celui des ions Ti3+. Les spectres pourraient ětre dǔs à des ruptures de liaisons covalentes métal‐métal entre ions Ti3+; les électrons non appariés qui en résultent seraient localiés sur l'un des trois sites de titane. On attribue l'anisotropie des raies au champ cristallin et à la‐distortion des octaèdres d'oxygène.
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The presence of the two main lines has been attributed to the twinning. The line intensity corresponds to a spin concentration of the order of 10−4 of the Ti3+ ions. The spectra are believed to be due to Ti2+ ions and related to the breaking of some covalent metal‐metal bonds involving the localization of come 3d electrons on one of the three different Ti sites. The line anisotropy has been ascribed to the distorted octahedral crystal field. On présente les spectres de résonance paramagnétique électronique obtenus sup des cristaux de Ti3O5. Une étude aux rayons X a montré que ces cristaux sont maclés. On observe sur ces spectres plusieurs raies peu intenses et 2 raies de forte intensityé, ayant des facteurs g anisotropes. On attribue l'existence des 2 raies intenses au maclage des cristaux. L'intensité des raies correspond à une valeur de l'ordre de pour le rapport du nombre de spins à celui des ions Ti3+. 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title Electron Paramagnetic Resonance Spectra of Ti3O5 Crystals
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