AbstractFor Ising ferromagnets withS= 1,S= 3/2, andS= 2, the magnetization 〈Sz〉 and the Curie temperatureTCare calculatded with the use of pair mode lapproximation. Assuming the bilinear and biquadratic exchange interactions (JandJ′) between nearest‐neighbouring pair of spins and the uniaxial single‐ionic anisotropyDfor each spin, the behaviours of 〈Sz〉 andTCas a function of these exchange parameters and the uniaxial anisotropy parameter are investigated for the Ising spin systems with various value