EPR Study of Chromium Ions Doped Gallium Borate

A.A. Prokhorova, L.F. Chernushb, R. Minikayevc, J. Lančoka, A.D. Prokhorovb aInstitute of Physics AS CR, Na Slovance 2, 18221 Prague, Czech Republic bA.A. Galkin Donetsk Institute for Physics and Engineering, R. Luxembourg 72, 83114 Donetsk, Ukraine cInstitute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668, Warsaw, Poland

Received: July 22, 2019; in final form September 9, 2019

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New data on the state of Cr3+ ion impurities in a single crystal of YGa3(BO3)4 were obtained from analysis of the electron paramagnetic resonance spectra. Crystal structure, lattice parameters, and atomic position of this crystal were studied by X-ray powder diffraction method. The Cr3+ ions are found to substitute for the trivalent gallium ions. The spectra of Cr3+ ions located at three magnetically nonequivalent sites that rotated through 120° are registered. The obtained parameters of spin Hamiltonian of the Cr3+ ions in the YGa3(BO3)4 single crystal were analyzed. Crystal structure, lattice parameters, and atomic position of this crystal are studied by X-ray powder diffraction method.

DOI:10.12693/APhysPolA.136.947 topics: EPR, RAB, X-ray diffraction, multiferroics, rare-earth, aluminum borates, gallium borates, spin Hamiltonian parameters, superposition model, low-spin state