Author:
Lamelas F. J.,Werner S. A.,Shapiro S. M.,Mydosh J. A.
Abstract
ABSTRACTElastic neutron-scattering measurements on two samples of Cu alloyed with 1.3% Mn and 0.55% Mn show that the spin-density-wave (SDW) features found in more concentrated alloys persist in the limit of very dilute alloys. These features consist of temperature-dependent incommensurate peaks in magnetic neutron scattering, with positions and strengths which are fully consistent with those in the concentrated alloys. The implications of these measurements are twofold. First, it is clear from our data that SDW magnetic ordering occurs across the entire range of CuMn alloys which have typically been interpreted as spin glasses. Second, the more fundamental significance of this work is the suggestion via extrapolation that a peak in the magnetic susceptibility χ(q) occurs in pure copper, at a value of q given by the Fermi-surface diameter 2kF.
Publisher
Springer Science and Business Media LLC
Reference23 articles.
1. Spin-density-wave antiferromagnetism in chromium
2. 20 An exception with rather sharp diffraction peaks is found in Ref. 18, consisting of a highly concentrated (35% Mn) sample which was subjected to prolonged low-temperature anneals in order to develop ASRO. This sample clearly belongs in a different class than the typical CuMn alloys. Interestingly, SDW peaks with the usual width show up in the inelastic scans on this sample.
3. Cu-Mn: Atomic short-range order, spin-density wave, and spin glass