The effect of magnetic ordering on light emitting intensity of Eu-doped GaN

Abstract

The optical and magnetic properties of Eu-doped GaN prepared by ion implantation were reported and the effect of magnetic field on the photoluminescence (PL) behaviour was studied. The PL spectra show that the samples exhibit strong emission at around 622.0 nm. Magnetic measurement reveals ferromagnetic ordering at room temperature. There was an obvious correlation between the PL intensity and the external magnetic field. When external magnetic field of 1000 Oe was applied to the sample, a decrease of roughly 24% in the peak intensity at 622 nm was observed. The mechanics of the magnetic ordering-modulated light emission of rare-earth-doped GaN films is discussed. It may have applications in producing magneto-optical devices.