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  Walker, H.C.; Le, M.D.; McEwen, K.A.; Bleckmann, M.; Süllow, S.; Mazzoli, C.; Wilkins, S.B.; Fort, D.: 5f delocalization-induced suppression of quadrupolar order in U(Pd_1-xPt_x)₃. Physical Review B 84 (2011), p. 235142/1-7

10.1103/PhysRevB.84.235142

Abstract:
We present bulk magnetic and transport measurements and x-ray resonant scattering measurements on U(Pd1−xPtx)3 for x=0.005 and 0.01, which demonstrate the high sensitivity of the quadrupolar order in the canonical antiferroquadrupolar ordered system UPd3 to doping with platinum. Bulk measurements for x=0.005 reveal behavior similar to that seen in UPd3, albeit at a lower temperature, and x-ray resonant scattering provides evidence of quadrupolar order described by the Qxy order parameter. In contrast, bulk measurements reveal only an indistinct transition in x=0.01, consistent with the observation of short-range quadrupolar order in our x-ray resonant scattering results.