Structural and physical properties evolution of BaIr1-xMnxO3 solid solutions synthesized by high-pressure sintering

The BaIr1-xMnxO3 (0.0≤x≤1.0) solid solutions were synthesized by using the solid-state chemical method and high pressure sintering in the pressure range 0-5 GPa. According to the pressure-composition 'phase diagram' at 1000 deg. C, the 9M BaIr1-xMnxO3 transforms to the 6M form at 5 GPa and x≤1/6. In the x range 0.5-1.0, it transforms to the 9R form in a large pressure range. For the 9M BaIrO3, the Mn ions substitution for Ir ions enhances the semiconducting property, and reduces the weak ferromagnetism. When x is larger than 1/3, the 9M/9R BaIr1-xMnxO3 behave spin-glass-like state at low temperature, with the glass transition temperature Tg about 60 K. For the 6M BaIrO3, the Mn ions doping results in that it transforms to insulator and spin-glass-like magnetism from the initial paramagnetic metal. - Graphical abstract: The BaRu1-xMnxO3 solid solutions were synthesized by using the solid-state chemical method and high-pressure sintering, and the pressure-composition 'phase diagram' at 1000 deg. C was obtained.