Abstract
We have investigated the magnetic properties of . Stoichiometric polycrystalline sample of was prepared by solid-state reaction method in a stream of CO/ gas. The X-ray power diffraction pattern shows that the diffraction peaks are indexed with respect to the rhombohedral structure with a space group of R3m. The temperature dependent magnetization for shows two-step phase transitions at about 220 and 250 K. The transition at 250 K is an antiferromagnetic transition and that at 220 K is a structural transition.
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