Применение высокочастотного ЭПР/ЭСЭ для идентификации примесного состава и электронной структуры керамик на основе гранатов | Zendy

E. V. Edinach | Zendy; И. А. Успенская | Zendy; A. S. Gurin | Zendy; R. A. Babunts | Zendy; Г.Р. Асатрян | Zendy; N. G. Romanov | Zendy; А.Г. Бадалян | Zendy; P. G. Baranov | Zendy

Open Access

Применение высокочастотного ЭПР/ЭСЭ для идентификации примесного состава и электронной структуры керамик на основе гранатов

Author(s) -

E. V. Edinach,

И. А. Успенская,

A. S. Gurin,

R. A. Babunts,

Г.Р. Асатрян,

N. G. Romanov,

А.Г. Бадалян,

P. G. Baranov

Publication year - 2019

Publication title -

физика твердого тела

Language(s) - English

Resource type - Journals

eISSN - 1726-7498

pISSN - 0367-3294

DOI - 10.21883/ftt.2019.10.48262.503

Subject(s) - electron paramagnetic resonance , gadolinium , spectral line , ion , impurity , materials science , chemistry , yttrium , ferromagnetic resonance , nuclear magnetic resonance , analytical chemistry (journal) , magnetization , magnetic field , physics , organic chemistry , quantum mechanics , astronomy , chromatography , metallurgy , oxide

Electron paramagnetic resonance (EPR) spectra of Ce3+, Yb3+, Cr3+, and Gd3+ impurity ions in yttrium aluminum garnet Y3Al5O12 (YAG) ceramics were detected and identified at frequency of 94 GHz. The advantage of measuring the EPR spectra in the high-frequency range compared to the standard EPR technique is shown, which makes it possible to separate the EPR spectra characterized by different anisotropic g-factors and also to isolate the EPR signals due to the splitting of the fine structure for centers with high-spin states. In ceramics with a high content of magnetic Gd3+ ions, EPR and electron spin echo (ESE) spectra of multi-ionic gadolinium complexes were observed, and EPR spectra of complexes with the maximum number of exchange-coupled gadolinium ions are seen at low temperatures. The temperature dependences of the EPR spectra indicates ferromagnetic ordering of exchange-coupled complexes of gadolinium.

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