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- W1991983166 abstract "Abstract The recent more thorough reinvestigation of the U–Ge system has finally established the existence of five compounds with the chemical formulae U5Ge4, UGe, U3Ge5, UGe2 and UGe3. Here we add another compound UGe2-x, existing in a homogeneity range of 0.30 < x > 0.35, and crystallizing in the defect tetragonal ThSi2-type structure. This compound is a ferromagnet with T c = 47 K. For all these compounds we have revised earlier measured magnetic properties and measured (often for the first time) the magnetotransport properties such as the electrical resistivity at 0T and in applied magnetic fields up to 8 T. We have found no superconducting properties for U5Ge4 down to 20 mK, which was claimed earlier. The most striking features found for both ferromagnets UGe2-x (ThSi2-type phase) and UGe2 (ZrGa2-type phase) are their temperature dependences of the magnetoresistivity (MR). At low temperatures the MRs for both these phases are large and positive which, above 10 and 15 K respectively, change sign to negative. The largest negative values of MR were found not at the corresponding Tc values but at the characteristic temperature T', which is an inflection point T iof the ρ(T) curve; this is attributed to be a measure of the spin fluctuation temperature Tsf." @default.
- W1991983166 created "2016-06-24" @default.
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- W1991983166 date "2002-05-01" @default.
- W1991983166 modified "2023-09-25" @default.
- W1991983166 title "Magnetotransport of compounds in the U–Ge system" @default.
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- W1991983166 doi "https://doi.org/10.1080/13642810208224371" @default.
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