The Structural and Magnetic ordering in $La{}_{0.5-x}N{d}_{x}C{a}_{0.5}Mn{O}_3$ (0.1 \ensuremath{\le} x \ensuremath{\le} 0.5) Manganites

Abstract

The crystal and magnetic structure of polycrystalline $La{}_{0.5-x}Nd{}_{x}C{a}_{0.5}MnO{}_3$ (0.0 \ensuremath{\le} x \ensuremath{\le} 0.5) samples have been investigated using magnetization, resistivity, transmission electron microscope, and neutron diffraction techniques. The samples are isostructural and possess orthorhombic structure in \textit{Pnma} space group. On lowering of temperature, the samples exhibit CE - type antiferromagnetic structure coexisting with a weak ferromagnetic ordering. The charge and orbitally ordered antiferromagnetic phase is weakened by the growth of ferromagnetic phase. The evolution of structural distortions and magnetic structure at low temperature as a function of Nd doping exhibit a strong correlation with A - site disorder (${\sigma }^2$).

To appear in J. Magn. Magn. Mater