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

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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 ... continued below

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10 p.

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Noakes, D.R.; Fawcett, E.; Sternlieb, B.L.; Shirane, G. & Jankowska, J. December 31, 1997.

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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.

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10 p.

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OSTI as DE97008939

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  • International conference on neutron scattering (ICNS), Toronto (Canada), 17-21 Aug 1997

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  • Other: DE97008939
  • Report No.: BNL--64607
  • Report No.: CONF-970814--
  • Grant Number: AC02-76CH00016;FG05-88ER45353
  • Office of Scientific & Technical Information Report Number: 622815
  • Archival Resource Key: ark:/67531/metadc694838

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  • December 31, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Aug. 4, 2016, 7:13 p.m.

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Noakes, D.R.; Fawcett, E.; Sternlieb, B.L.; Shirane, G. & Jankowska, J. Nature of the Triple Point in Chromium Alloys: Mode-Softening of the Incommensurate Spin Density Wave, article, December 31, 1997; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc694838/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.