Abstract

Polycrystalline (U1−xTbx)Co2Ge2 solid solutions have the ThCr2Si2-type crystal structure and order antiferromagnetically. AC-susceptibility at 80–295 K yields paramagnetic Curie temperatures θ = −350±50, −15±5, −50±15, −12±5, and −80+5 K, and effective magnetic moments μeff = 4.5, 5.9, 7.3, 8.5, and 12.0 (±0.5)μB, for samples with x = 0, 0.25, 0.50, 0.75 and 1, respectively. The high μeff values are related to occurrence of paramagnetic moments on U, Tb and Co, of which only U and Tb moments order magnetically.

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