Ti substitution for Mn in MnCoGe - The magnetism of Mn0.9Ti0.1CoGe

Bulk magnetization measurements (5-320 K; 0-8T) reveal that below room temperature Mn0.9Ti0.1CoGe exhibits two magnetic phase transitions at ~178 K and ~280 K. Neutron diffraction measurements (3-350K) confirm that the transition at ~178K is due to the structural change from the low-temperature orthorhombic TiNiSi-type structure to the higher temperature hexagonal Ni2In-type structure while the transition at ~280K originates from the transition from feromagnetism to paramagnetism.