EPR study of spectral characteristics of REE oxides.

DOI: 10.62564/M4-MB1415

Mykola Bataiev, Natalia Barchevska, Olena Lavrynenko, Yurii Bataiev

Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine


The intensities of the EPR line for Er2O3 REE samples correspond to the Lorentz line theoretical model [1]. The dependence of the intensity of the lines on the corresponding the gain value has a linear model of the parameters. Dependence plane of the EPR line corresponding to the number of spin domains of the sample, as well shows a linear model of the coefficient value. EPR spectral lines located at 3560G, 1665G, and also at 3050G on the scale of the electromagnetic resonance field refer to the main ion Er3+ rare earth oxide (REE) oxide Er2O3 [2] EPR lines indicate the presence of ions in the corresponding electronic form and refer to the spin of ions and REE oxides. The value of the factors is 1.7554 for the oxide system of Er2O3-CeO2 oxide [1, 2] testifies to the presence of Er3+ ion in the system of the cubic form of Er2O3 oxide and corresponding phase formation of rhombic Er2O3 oxide after heat treatment 1100ºС-1500ºС. The g-factor value of 1.7554 in the EPR spectrum implies the presence of the main one Er3+ ion with an additional shift, which corresponds to the appearance and new formation of an additional one of the phase part of the Er2O3 oxide after high-temperature treatment of the material oxide 1100ºС-1500ºС. The g-factor value of 2.049 is responsible for the proper transition of the main Er 3+ ion with the electronic structure 4f 11 5s 2 5p 6 of the oxide Er2O3 . Spin configuration state for Er3+ oxide Er2O3 is defined in the format 4 I 15/2 . The g-factor value is 0.958 is responsible for the Er2+ -based ion transition with an additional shift that implies the presence of Er ions in different formats in different concentrations in oxides systems based on Er2O3 . The configuration of the ion Er2+ electronic state is determined 4f 12 5s 2 5p 6 and the configuration of the spin state for the Er2+ ion is defined by 3H6 .

Keywords
EPR, Spectroscopy, Oxides, Ceramics.

Acknowledgments
The authors are grateful to O. A. Kornienko and Frantsevich Institute for Problems of Material Science NASU.

References
[1] Bataiev М.М., Bataiev Yu.M., Lavrynenko O.M., Kornienko O.A., Nanotechnologii, 18 (2), 311-320, (2020). [2] O.M. Lavrynenko, O.I Bykov, Yu.M. Bataiev, M.M. Bataiev, O.A. Kornienko, Bulletin of ONU, Chemistry, 25, 3 (75) 2020.