Magnetic and structural properties of Mg(Ga0.95Fe0.05)2O4 crystal grown by optical floating zone method

Abstract

The crystal structure and magnetic properties of [Formula: see text] grown by optical floating zone method have been studied. The chemical composition and element ratio in the crystal were analyzed by energy dispersive X-ray spectroscopy (EDS). The results of X-ray diffraction and Raman spectra of the crystal reveal that it has a spinel structure with high crystallinity and purity. The magnetic domain period observed by using magnetic force microscopy (MFM) shows that the crystal has a stable multi-domain structure. According to the superconducting quantum interference device (SQUID) results, the magnetization increases nonlinearly with increasing magnetic field strength and approaches magnetic saturation, proving it is a paramagnetic medium. The magnetization decreases rapidly below Curie temperature and approaches stability with increasing temperature.