<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Polycrystalline CaMn<sub>1‐x</sub>Fe<sub>x</sub>O<sub>3‐</sub><sub>δ</sub> (x = 0—0.4) manganites are prepared by calcination of stoichiometric amounts of CaCO<sub>3</sub>, MnO<sub>2</sub>, and Fe<sub>2</sub>O<sub>3</sub> (950 °C, 2 d) followed by sintering in air (1300 °C, 1 d).</p> </abstract>