Magnetic and X-ray diffraction investigation on Mg1−xMn2+xO4 spinels

X-ray powder diffraction, electron paramagnetic resonance and static magnetisation measurements of slowly cooled Mg1−xMn2+xO4 solid solutions for 0≤x≤1 have been performed in order to investigate the effects of the Mg/Mn ratio on the spinel inversion. Our results prove that a small inversion degree exists at room temperature for the samples with x<0.5 and suggest that the inversion decreases with increasing x, that is by reducing the Mg2+ content. The multi-technique approach for the definition of the correct synthetic and cooling procedures enables the formation of single-phase high purity materials.