Background: Rare earth elements (Re), nickel and oxygen could form a
series of compounds with the general formula Ren+1NinO3n+1 whose structures are
described by stacking along the c-axis of n finite LaNiO3 pervoskite layers separated
by ReO rock salt like layers.
Objective: This study aims at synthesing Y4
(YNO) by ball milling and annealing
procedures using oxides of rare earth element, yttrium (Y) and transition metal,
nickel (Ni) oxides as a precursor.
Methods: X-Ray Diffraction (XRD) is used to investigate samples and magnetic
measurements were conducted using a vibrating sample magnetometer.
Results and Conclusion: The XRD exhibits that there is no significant formation of the compound
under lower speed of the mill (about 300 rpm). The Y4
compound is partially formed by
increasing the mill speed to 500 rpm. There are a number of significant peaks that have been observed in
the XRD patterns. The annealed samples without milling up to 1200°C have no effect on the formation of
the specified compound. Y4
compound has formed with annealing and high speed of mill. Milling
and annealing have a significant effect on the crystallite size of the materials. The crystallite size of
phases is varied within nano-range. Magnetic properties of oxide mixture, milled and annealed, which
form the Y4
compound, were studied by means of a vibrating sample magnetometer. Annealed
samples show low magnetization. The saturation magnetization increases with milling. There are a number
of patents invented using rare earth metals, and used in many applications, such as magnets, coats,
and biomedical devices.