title: Phase diagram of La(5/8-y)Nd(y)Ca(3/8)MnO(3) manganites.
abstract: We report a detailed study of the electric transport and magnetic properties of the La(5/8-y)Nd(y)Ca(3/8)MnO(3) manganite system. Substitution of La(3+) by smaller Nd(3+) ions reduces the mean ionic radius of the A-site ion. We have studied samples in the entire range between La-rich and Nd-rich compounds (0.1<y<0.625). Results of dc magnetization and resistivity show that doping destabilizes the ferromagnetic (FM) character of the pure La compound and triggers the formation of a phase-separated state at intermediate doping. We have also found evidence of a dynamical behaviour within the phase-separated state. A phase diagram is constructed, summarizing the effect of chemical substitution on the system.
authors.affiliation: Departamento de Física, Centro Atómico Constituyentes, CNEA, Avenida General Paz 1499 (1650), San Martín, Provincia de Buenos Aires, Argentina.
authors.forename: J
authors.initials: J
authors.lastname: Sacanell
authors.forename: P
authors.initials: P
authors.lastname: Levy
authors.forename: A G
authors.initials: AG
authors.lastname: Leyva
authors.forename: F
authors.initials: F
authors.lastname: Parisi
authors.forename: L
authors.initials: L
authors.lastname: Ghivelder