Excitations of the spin-density wave in pure chromium

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This paper summarizes recent investigations of the magnetic excitations of the spin density wave (SDW) in pure Cr in both the low temperature longitudinally polarized phase (T < 122K) and in the higher temperature transversely polarized phase (122K < T < 312K). In both phases spin wave modes of very high velocity are observed originating from the incommensurate Bragg points. In the transversely polarized SDW phase new additional excitations are observed, centered in reciprocal space at the (1,0,0) commensurate point. These excitations are not affected by a magnetic field. Inelastic scattering in the paramagnetic phase above the Neel point (312K) ... continued below

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Pages: 13

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Werner, S.A.; Shirane, G.; Fincher, C.R. & Grier, B.H. January 1, 1981.

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Description

This paper summarizes recent investigations of the magnetic excitations of the spin density wave (SDW) in pure Cr in both the low temperature longitudinally polarized phase (T < 122K) and in the higher temperature transversely polarized phase (122K < T < 312K). In both phases spin wave modes of very high velocity are observed originating from the incommensurate Bragg points. In the transversely polarized SDW phase new additional excitations are observed, centered in reciprocal space at the (1,0,0) commensurate point. These excitations are not affected by a magnetic field. Inelastic scattering in the paramagnetic phase above the Neel point (312K) is observed in a reasonably well localized region of reciprocal space near (1,0,0) indicating that there are spin-spin correlations extending over many bcc unit cells and persisting to temperatures at least as high as 1.7 T/sub N/.

Physical Description

Pages: 13

Notes

NTIS, PC A02/MF A01.

Source

  • Symposium on neutron scattering, Argonne, IL, USA, 12 Aug 1981

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  • Other: DE81031972
  • Report No.: BNL-30084
  • Report No.: CONF-810840-6
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 6075615
  • Archival Resource Key: ark:/67531/metadc1112574

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1981

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • April 23, 2018, 4:06 p.m.

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Werner, S.A.; Shirane, G.; Fincher, C.R. & Grier, B.H. Excitations of the spin-density wave in pure chromium, article, January 1, 1981; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc1112574/: accessed April 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.