Phase diagram of La5/8-yNdyCa3/8MnO3 manganites

SACANELL, J.; PABLO LEVY,; GABRIELA LEYVA, ANA; FRANCISCO PARISI,; LUIS GHIVELDER,

JOURNAL OF PHYSICS CONDENSED MATTER

IOP PUBLISHING LTD

Año: 2007 vol. 19 p. 18622 - 18622

0953-8984

We report a detailed study of the electric transport and magnetic properties of the La5/8−yNdyCa3/8MnO3 manganite system. Substitution of La3+ by smaller Nd3+ 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 studied samples in the entire range between La-rich and Nd-rich compounds smaller Nd3+ 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 studied samples in the entire range between La-rich and Nd-rich compounds 5/8−yNdyCa3/8MnO3 manganite system. Substitution of La3+ by smaller Nd3+ 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 studied samples in the entire range between La-rich and Nd-rich compounds 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). 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. 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.