Fig. 7: Temperature-dependent intrinsic magnetic properties.
From: Intrinsic hard magnetism and thermal stability of a ThMn12-type permanent magnet

a Exchange interaction parameters Jij as a function of the interatomic distance, b saturation magnetization μ0Ms versus temperature, and c uniaxial magnetocrystalline anisotropy Ku versus temperature of SmFe12, SmFe11Ti, SmFe10Co2, SmFe10CoAl, and SmFe9Co2Al. In a the nearest- and next-nearest-neighbor exchange interactions of the α-Fe structure are shown in the open circles. Open symbols in b and c denote the experimental data for SmFe12, SmFe11Ti, and SmFe9.6Co2.4, taken from refs. 15–17,22,23.