Abstract
Polycrystalline Ce5Ge4 compound (orthorhombic Sm5Ge4-type structure, space group Pnma, No. 62) orders ferromagnetically at ∼12 K (TC). Low field dc magnetization and ac magnetic susceptibility data reveal presence of competing magnetic interactions below TC. Heat capacity of Ce5Ge4 in zero applied field indicates a second order transition with a peak centered at 11 K. Powder neutron diffraction studies confirm the existence of a commensurate magnetic order in this compound at 10 K without a change of crystal structure. The Ce moments lie in the ab plane and the moment at Ce site is found to be only ∼0.4 μB at this temperature.
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