A study was made of the effect of composition and heat-treatment conditions on the structural and transport properties of La1−x−yCaxNayMnO3±δ solid solutions. The materials obtained offer a magnetoresistance of about 48% in a magnetic field of 1.2 MA/m.

Effect of A-Site Vacancies on the Magnetoresistive Effect in La1−x−yCaxNayMnO3±δ. O.Z.Yanchevskii, D.A.Durilin, D.M.Polishchuk, A.I.Tovstolytkin, A.G.Belous: Inorganic Materials, 2011, 47[2], 196-203