The influence of high magnetic field on electric-dipole emission spectra of Eu3+ in different single crystals

Abstract

In this work, the effect of pulsed high magnetic field on the integral intensity of the electric-dipole emission spectrum of Eu³⁺ in YVO₄:Eu³⁺ and GdVO₄:Eu³⁺ single crystals was studied and the results showed magnetic field induced luminescence suppression in YVO₄:Eu³⁺ and luminescence expansion in GdVO₄:Eu³⁺. The single crystals were prepared by the optical floating zone method. The strong effect of the magnetic field on the splitting and emission of ⁵D₀–⁷F₂ and ⁵D₀–⁷F₄ transitions in Eu³⁺ was investigated. The integral luminescence intensities of Eu³⁺ are proportional to the magnetic field at higher than 15 T. For GdVO₄:Eu³⁺, the integral intensity increases with the strengthening of magnetic field, and is completely opposite to that for YVO₄:Eu³⁺. In this study, the dependence of luminescence integral intensity on the magnetic field was proposed to be the result of the structural change induced by high magnetic field which changes the symmetry of Eu³⁺ ions in single crystals.