In order to explore whether the ferromagnetic metallic state ever occurs in the electron-doped rare-earth manganates, a comparative study of the effects of magnetic fields and of cation substitution in the Mn-site were ...

Electron-doped rare-earth manganates of the type Ca(1-x)Ln(x) MnO3 (Ln = La, Nd, Gd or Y) with x = 0.2 and 0.3 show charge ordering in the 150-270 K range, but the charge-ordering transition temperature, T-CO generally ...

Effects of cation substitution in the manganese site of charge-ordered (CO) rare earth manganates have been studied to find out how the properties vary with the average radius of theAsite cations, 〈rA〉, and the substituent ...

Substitution of Ti and Zr in the B-site of La0.7Ca0.3MnO3 lowers the TC and the temperature of insulator—metal transition. Substitution of Ru in the B-site of La0.7Ca0.3MnO3, however, does not alter the TC or TIM significantly. ...

The effect of disorder arising from the mismatch between the average sizes of the A-site cations in the rare-earth manganates, L(0.5)A(0.5)MnO(3) (L = rare earth, A = alkaline earth), on their charge-ordering behavior has ...

Manganates of the compositions Nd0.5-xLaxCa0.5MnO3 and Pr0.5-xLaxCa0.5 MnO3, with the average A-site cation radius, <r(A)>, in the range 1.17-1.20 Angstrom, are charge ordered at ordinary temperatures (T-CO similar to 240 ...

Some of the compositions of the half-doped rare-earth manganates, La0.5−xLnxCa0.5MnO3 (Ln=Nd, Pr) and Nd0.5Ca0.5−xSrxMnO3 with relatively small A-cation radii, 〈rA〉, show an unusual behavior wherein they become ferromagnetic ...

A fascinating phenomenon, recently found to occur in certain transition-metal oxides, is phase separation wherein pure, nominally monophasic oxides of transition metals with well-defined compositions separate into two or ...