Magnetic to nonmagnetic transition in a highly hybridized f-electron system: U(Ga1−xGex)3

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Abstract
UGa3 is an antiferromagnetic system with a Néel temperature TN =67 K and UGe3 is a weakly paramagnetic system with a nearly temperature‐independent magnetic susceptibility and a slightly enhanced low‐temperature electronic specific heat coefficient of 20 mJ/mole K2. The room‐temperature lattice constant and the temperature dependence of the magnetic susceptibility, electrical resistivity, and low‐temperature specific heat have been measured for the pseudobinary alloy system, U(Ga1−xGex)3. TN is rapidly depressed with increasing x and appears to go to zero at x≂0.18. The magnetic susceptibility remains nearly temperature independent across the series and neither the magnetic susceptibility nor low‐temperature specific heat display any significant enhancement in the paramagnetic regime.