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Spin-Density-Wave Magnetism in Dilute Copper-Manganese Alloys

Published online by Cambridge University Press:  22 February 2011

F. J. Lamelas ,
S. A. Werner ,
S. M. Shapiro  and
J. A. Mydosh
F. J. Lamelas
Affiliation:
Department of Physics, Marquette University, Milwaukee, WI 53233
S. A. Werner
Affiliation:
Department of Physics, The University of Missouri, Columbia, Missouri 65211
S. M. Shapiro
Affiliation:
Department of Physics, Brookhaven National Laboratory, Upton, New York 11973
J. A. Mydosh
Affiliation:
Kammerlingh Onnes Laboratory, Rijksuniversiteit, 2300 RA Leiden, The Netherlands
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Abstract

Elastic 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 713
Copyright
Copyright © Materials Research Society 1995

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References

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