Fig. 4

Concentration dependencies of the normalized unit cell dimensions of PrCo_1 − x Fe _x O₃ series. Solid and open symbols correspond to the samples synthesized by sol-gel technique at 800 °C and by solid-state reactions at 1300 °C, respectively. The dashed lines are guide for the eyes. The lattice parameters of the orthorhombic cell are normalized to the perovskite one as follows: a _p   = a _o /√2, b _p   = b _o /√2, c _p   = c _o /2, V _p   = V _o /4