[en] A detailed investigation and characterization is made of the magnetic phase transitions that occur in the cubic CeFe₂ Laves phase compound using high resolution direct measurements of the temperature derivative of the electrical resistivity (drho/dT). The results confirm the existence of a spin reorientation transition (SRT) in the ferromagnetic phase of CeFe₂ at T/sub sr/ approximately (132 +- 1) K, of second order character. This transition can be understood in terms of a [100] → [uuw] spin reorientation transition due to a non-negligible K₃ term in the expression of the magnetic anisotropy energy. Near the Curie temperature, critical analysis of drho/dT data shows that CeFe₂ behaves as an isotropic Heisenberg ferromagnet with a critical temperature T/sub c/ approximately (227.5 +- 0.1) K and a critical exponent α = 0.10 +- 0.02. This value is consistent with the theoretical expectancy based on the magnetic specific heat. (author)