mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal University10.26907/mrsej-23102mrisel-21Research ArticleСтатьиMagnetic resonance studies of Ar-ion irradiated rutileSukhanovA. A.

Kazan

ansukhanov@mail.ruValeevV. F.

Kazan

NuzhdinV. I.

Kazan

KhaibullinR. I.

Kazan

Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RASRussian Federation20231212202325123102(8 pp.)Copyright © Sukhanov A.A., Valeev V.F., Nuzhdin V.I., Khaibullin R.I., 20232023Sukhanov A.A., Valeev V.F., Nuzhdin V.I., Khaibullin R.I.Sukhanov A.A., Valeev V.F., Nuzhdin V.I., Khaibullin R.I.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/21

The point defects have been produced in the rutile structure by irradiation of a single crystalline (001)-TiO2 rutile platet wih 40 keV Ar+ ions. It is found that Ar-ion bombardment of rutile results in a large number of positively charged oxygen vacancies and, as a consequence, leads to a change in the valence of neighbouring Ti cations. Electron paramagnetic resonance (EPR) of Ar-ion irradiated TiO2 rutile is studied in detail. The analysis of angular and temperature dependences of EPR spectra makes it possible to conclude that EPR signals are associated with Ti3+ ions in the sixfold symmetric environment. In addition to the main signal from even titanium isotopes, eight equidistant weak lines are observed due to the hyperfine interaction typical for two titanium isotopes: 47Ti with a nuclear spin I=5/2 (natural abundance of 7.4%) and 49Ti with a nuclear spin I=7/2 (natural abundance of 5.4%). By comparing the g-tensor components with the reference data it is concluded that these Ti3+-based centers in Ar-ion implanted rutile were not described before.

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The authors declare that there are no conflicts of interest present.