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Magnetic susceptibility and atomic structure of paramagnetic Zr-(Co, Ni, Cu) amorphous alloys

Recent analysis [1] of the low temperature specific heat and superconductive data for non-magnetic TE_100-xTL_x amorphous alloys (TE=Ti, Zr or Hf ; TL=Ni or Cu) suggested an fcc-like atomic arrangement in pure amorphous TE metals. Here, we present a detailed analysis of our magnetic susceptibility in pure amorphous TE metals. Here, we present a detailed analysis of our magnetic susceptibility data for a number of paramagnetic Zr_100-xTL_x amorphous alloys (TL=Co, Ni or Cu ; x<70). By combining our data for magnetic susceptibility and superconducting transition temperature (T_c) with the corresponding literature data for the low temperature specific heat we extracted the Pauli suscpetibilities and the Stoner enhancement factors (S) for all alloys. A linear extrapolations of the magnetic susceptibilities and superconducting transition temperatures to x=0 yielded an estimate for the corresponding parameters of the hypothetic pure amorphous Zr. The extrapolated values agree quite well with the results obtained from the recent band structure calculation and the experimental data for the cubic crystalline phases of Zr [1]. However, depending on the selected parameters the agreement between the extrapolated and calculated value is rather better either for an fcc-like or an bcc-like atomic arrangement. The possible reason for this ambiguity (in terms of the local coordination of Zr-atoms in Zr-TL alloys [2] is presented. [1] I. Bakonyi, J.Non-Cryst. Solids 180 (1995) 131. [2] F. Paul and R.Frahm, Phys. Rev. B 42 (1990) 10945

Zr; amorphous; susceptibility; structure

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