Anisotropy of the sublattice magnetization and magnetoresistance in Co/Re superlattices on Al{sub 2}O(1120).

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[Co(20 {angstrom})/Re(6{angstrom})]{sub 20} superlattices were grown on a (11{bar 2}0) surface of a Al{sub 2}O{sub 3} single crystal, with the [0001] direction of their hcp structure in the plane of the film. The Co layers were found to be antiferromagnetically coupled (AF), with a saturating field of 6 kOe. Polarized neutron reflectivityy was used to determine the direction of the sublattice magnetization. In zero applied field, the AF moments are aligned along the Co [0001] axis. In a magnetic field H perpendicular to the Co [0001] axis, the sublattices moments evolve to a canted arrangement, with the AF component always ... continued below

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13 p.

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Charloton, T. September 29, 1998.

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[Co(20 {angstrom})/Re(6{angstrom})]{sub 20} superlattices were grown on a (11{bar 2}0) surface of a Al{sub 2}O{sub 3} single crystal, with the [0001] direction of their hcp structure in the plane of the film. The Co layers were found to be antiferromagnetically coupled (AF), with a saturating field of 6 kOe. Polarized neutron reflectivityy was used to determine the direction of the sublattice magnetization. In zero applied field, the AF moments are aligned along the Co [0001] axis. In a magnetic field H perpendicular to the Co [0001] axis, the sublattices moments evolve to a canted arrangement, with the AF component always perpendicular to the field. With H along the Co[0001] axis, the AF moments flop in a direction perpendicular to Co[0001] axis. The spin flop transition is not abrupt, but can be described as a gradual rotation that is completed at 2 kOe. The anisotropy of the sublattice magnetization is related to the anisotropy of the magnetoresistance. This has the conventional dumbbell behavior with the field applied perpendicular to the Co[0001] axis, but exhibits an extended plateau near H = 0, and a slight increase up to H {approximately} 2 kOe, when H is parallel to Co[0001] axis.

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13 p.

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INIS; OSTI as DE00010985

Medium: P; Size: 13 pages

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  • 43rd Annual Conference on Magnetism and Magnetic Materials, Miami, FL (US), 11/09/1998--11/12/1998

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  • Report No.: ANL/MSD/CP-97361
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10985
  • Archival Resource Key: ark:/67531/metadc628073

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  • September 29, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 1:01 p.m.

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Charloton, T. Anisotropy of the sublattice magnetization and magnetoresistance in Co/Re superlattices on Al{sub 2}O(1120)., article, September 29, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc628073/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.