Abstract
The crystal structural and magnetic properties of the La3Co2MoO9 double perovskite ceramic sample have been studied by X-ray and neutron powder diffraction and magnetometry. Structural investigation indicated that sample is monoclinic perovskite with space group P21/n and unit cell parameters of a=5.5812(2) Å, b=5.7073(2)) Å, c=7.9279(3) Å, β=89.96(2)o, V=252.558(11)Å3 at room temperature. The two crystallographically-distinct 2d and 2c octahedral positions are occupied ordered by Co2+ (2d position) and Co2+ and Mo5+/Mo4+ (2c-position). Magnetometry data together with neutron powder diffraction study has shown that this perovskite is the ferrimagnetic (TC=147 K) with the uncompensated magnetic moment of 2 μB and the high value of coercive force HC (HC=75 kOe at 4.2 K}.
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