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EPR of the V4+ ion in single crystals of pyrovanadates β-Mg2V2O7, α-Zn2V2O7: Spin-Hamiltonian parameters.

Title: EPR of the V4+ ion in single crystals of pyrovanadates β-Mg2V2O7, α-Zn2V2O7: Spin-Hamiltonian parameters.
Authors: Misra, S. K.1, Andronenko, S. I.2 Sergey.Andronenko@gmail.com
Source: Magnetic Resonance in Solids. 2018, Vol. 20 Issue 1, p1-8. 8p.
Subject Terms: *VANADATE minerals, *ELECTRON paramagnetic resonance, *SINGLE crystals, *TEMPERATURE effect, *HAMILTONIAN systems
Abstract: The angular variation of V4+ electron paramagnetic resonance (EPR) line positions were recorded in single crystals of β-Mg2V2O7 and α-Zn2V2O7 at 120 K and 295 K in three mutually perpendicular planes in the temperature range from 120 to 295 K and at some intermediate temperatures. Least-squares fitting was used by diagonalization of the Spin-Hamiltonian (SH) matrix to determine the SH parameters and the orientations of the principal axes of the g- and A-matrices from the angular variations of the EPR line positions. Although the V4+ SH parameters were found to be similar in the two crystals, the orientations of the principal axes of the g- and A-matrices were not found to be coincident in the two crystals. [ABSTRACT FROM AUTHOR]
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