EPR Spectroscopy of 53Cr3+ Monoisotopic Impurity Ions in a Single Crystal of Scandium Orthosilicate Sc2SiO5

Monoisotopic 53 Cr 3 + impurity ions in scandium orthosilicate single crystal ( Sc 2 SiO 5 ) are studied by the method of electron paramagnetic resonance in the X-band frequencies. The directions of the main principal magnetic axes and the parameters of the effective spin Hamiltonian that describe t...

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Bibliographic Details
Published in:Applied magnetic resonance 2021, Vol.52 (1), p.5-14
Main Authors: Tarasov, V. F., Eremina, R. M., Konov, K. B., Likerov, R. F., Shestakov, A. V., Zavartsev, Yu. D., Kutovoi, S. A.
Format: Article
Language:English
Subjects:
Anisotropy
Atoms and Molecules in Strong Fields
Electric fields
Electron paramagnetic resonance
Electron spin
Electrons
Fine structure
Impurities
Laser Matter Interaction
Magnetic fields
Magnetic properties
Mathematical analysis
Organic Chemistry
Original Paper
Physical Chemistry
Physics
Physics and Astronomy
Scandium
Single crystals
Solid State Physics
Spectra
Spectroscopy/Spectrometry
Spectrum analysis
Superhigh frequencies
Tensors
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Summary:Monoisotopic 53 Cr 3 + impurity ions in scandium orthosilicate single crystal ( Sc 2 SiO 5 ) are studied by the method of electron paramagnetic resonance in the X-band frequencies. The directions of the main principal magnetic axes and the parameters of the effective spin Hamiltonian that describe the magnetic characteristics of the impurity centers of chromium, which replaces scandium in two structurally nonequivalent positions, are determined. It is shown that the orientation dependencies of the EPR spectra are well described by the second-order spin Hamiltonian corresponding to the orthorhombic symmetry of the local crystal field acting on the impurity ion. It was assumed that the g -tensor and the A -tensor determining the Zeeman energy of electronic levels in a magnetic field and the hyperfine interaction of electron and nuclear spins are isotropic, and the entire anisotropy of the EPR spectra is due to the anisotropy of the D -tensor, which describes the fine structure of electronic levels in a crystalline electric field. A strong dependence of the probability of “forbidden” transitions between hyperfine sublevels of electronic levels on the orientation of an external magnetic field is established. Moreover, for some orientations, the probability of “forbidden” transitions exceeds the probability of “allowed” transitions.
ISSN:0937-9347
1613-7507
DOI:10.1007/s00723-020-01225-x