Search

Composites LiNi0.5Mn1.5O4-NiO nanosticks were prepared by a simple molten salt route of adding MnSO4 to molten LiNO3, NaNO3 and slightly excess NiSO4·6H2O. Field emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM) investigations revealed that one-dimensional composites LiNi0.5Mn1.5O4-NiO nanosticks were generated in a large quantity. The result of dc and ac magnetisation, as well as magnetic hysteresis measurements, shows that three different magnetic phases, i.e. ferrimagnetic, antiferromagnetic (AFM) and spin-glass-like (SGL) phases may coexist in LiNi0.5Mn1.5O4-NiO nanocomposites. Furthermore, magnetic measurements suggest that the exchange bias (EB) effect was obtained at low temperature. [ABSTRACT FROM AUTHOR]