Helical spin-density wave in Fe/Cr trilayers with perfect interfaces

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Despite the presence of only collinear, commensurate (C) and incommensurate (I) spin-density waves (SDW`s) in bulk Cr, the interfacial steps in Fe/Cr multilayers are now believed to stabilize a helical (H) SDW within the Cr spacer. Yet H SDW`s were first predicted in an Fe/Cr trilayer with perfect interfaces when the orientation of the Fe moments does not favor C ordering: if the number of Cr monolayers is even (odd) and the Fe moments are pointing in the same (opposite) direction, then a C SDW does not gain any coupling energy. Under these circumstances, a simple model verifies that H ... continued below

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12 p.

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Fishman, R.S. July 1, 1998.

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Description

Despite the presence of only collinear, commensurate (C) and incommensurate (I) spin-density waves (SDW`s) in bulk Cr, the interfacial steps in Fe/Cr multilayers are now believed to stabilize a helical (H) SDW within the Cr spacer. Yet H SDW`s were first predicted in an Fe/Cr trilayer with perfect interfaces when the orientation of the Fe moments does not favor C ordering: if the number of Cr monolayers is even (odd) and the Fe moments are pointing in the same (opposite) direction, then a C SDW does not gain any coupling energy. Under these circumstances, a simple model verifies that H ordering is indeed favored over 1 ordering provided that the Fermi surface mismatch is sufficiently small or the temperature sufficiently high.

Physical Description

12 p.

Notes

OSTI as DE99000221

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  • 43. international conference on magnetism and magnetic materials, Miami, FL (United States), 9-12 Nov 1998

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  • Other: DE99000221
  • Report No.: ORNL/CP--99130
  • Report No.: CONF-981101--
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 291076
  • Archival Resource Key: ark:/67531/metadc681065

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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.

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  • July 1, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Nov. 3, 2016, 7:02 p.m.

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Fishman, R.S. Helical spin-density wave in Fe/Cr trilayers with perfect interfaces, article, July 1, 1998; Tennessee. (digital.library.unt.edu/ark:/67531/metadc681065/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.