Neutron diffraction investigation of the crystal and magnetic structures in KCrF3 perovskite

compound crystallizes intetragonal structure at room temperature and undergoes a monoclinic distortion with the decrease in tempera-ture. The distortion of the crystal structure indicates the presence of cooperative Jahn-Teller distortion which isdriven by orbital ordering. With decreasing temperature, four magnetic phase transitions are observed at 79.5,45.8, 9.5, and 3.2 K, which suggests a rich magnetic phase diagram. Below