Application of High-Frequency Electron Paramagnetic Resonance/Electron Spin Echo for the Identification of the Impurity Composition and Electronic Structure of Ceramics Based Garnets

Journal Article · Tue Oct 15 04:00:00 EDT 2019 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783419100135· OSTI ID:22925104

Uspenskaya, Yu. A.; Gurin, A. S.; Babunts, R. A.; Asatryan, G. R.; Romanov, N. G.; Badalyan, A. G.; Baranov, P. G. ^[1]

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1. Ioffe Institute, Russian Academy of Sciences (Russian Federation)

Electron paramagnetic resonance (EPR) spectra of Ce{sup 3+}, Yb{sup 3+}, Cr{sup 3+}, and Gd{sup 3+} impurity ions in yttrium aluminum garnet Y{sub 3}Al{sub 5}O{sub 12} (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 Gd{sup 3+} 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.

• OSTI ID: 22925104
• Journal Information: Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 10 Vol. 61; ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
CERAMICS
CERIUM IONS
CHROMIUM IONS
ELECTRON SPIN RESONANCE
ELECTRONIC STRUCTURE
FINE STRUCTURE
GADOLINIUM COMPLEXES
GADOLINIUM IONS
GARNETS
HIGH SPIN STATES
IMPURITIES
LANDE FACTOR
SIGNALS
TEMPERATURE DEPENDENCE
YTTERBIUM IONS
YTTRIUM