Nature of the Triple Point in Chromium Alloys [electronic resource] : Mode-Softening of the Incommensurate Spin Density Wave

Published:: Ottawa, Canada : Natural Sciences and Engineering Research Council Canada, 1997.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 10 pages : digital, PDF file
Additional Creators:: Brookhaven National Laboratory, Natural Sciences and Engineering Research Council Canada, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

The magnetic stiffness parameter, A2, associated with the critical fluctuations in the paramagnetic phase close to the incommensurate spin-density-wave (SDW) transition of a Cr+0.18at.%Re single crystal, when compared with that of in pure chromium and dilute alloys of vanadium in chromium, indicates that the singularity responsible for the onset of the commensurate SDW phase occurs when A2 approaches zero at a finite value of the incommensurability parameter, delta 0.017 rlu, instead of zero as usually assumed. The mode of the incommensurate SDW softens as delta approaches this critical value with rhenium doping, and conversely hardens as delta increases when vanadium is added to chromium. Also, the amplitude of the critical scattering increases as delta approaches its end point, by a factor of about two going from 0.2 and 0.5at.%V to pure chromium, and by another factor near two in going from pure Cr to Cr+0.18at.%Re.

Report Numbers:

E 1.99:bnl--64607
E 1.99: conf-970814--
conf-970814--
bnl--64607

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Note:

Published through SciTech Connect.
12/31/1997.
"bnl--64607"
" conf-970814--"
"DE97008939"
"KC020201"
International conference on neutron scattering (ICNS), Toronto (Canada), 17-21 Aug 1997.
Fawcett, E.; Sternlieb, B.L.; Shirane, G.; Noakes, D.R.; Jankowska, J.

Funding Information:

AC02-76CH00016
FG05-88ER45353

View MARC record | catkey: 14453883