Abstract
We present results of a fairly complete study on which dopants M result in single-phase U1−xMxPt3 samples. The resulting new samples. M = Y, Lu, Sc, Hf, Zr, have been characterized by low temperature magnetic susceptibility and specific heat for x ⩽ 0.07. Based on a previously proposed model, the ca ratios of the present alloys would be expected to result in magnetic behavior as observed in U1−xThxPt3 and U(Pt1−xPdx)3. On the contrary, no magnetism is found; the Sc-doped samples actually show a suppression of spin fluctuations. A new proposal is made to explain which properties are critical for the magnetic behavior of UPt3, as well as its doped derivatives.
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