Alloying and strain relaxation effects on spin-reorientation transitions in Cox Ni1-x Cu3 Au (100) ultrathin films

W. C. Lin, B. Y. Wang, Y. W. Liao, Ker Jar Song, Minn Tsong Lin

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The crystalline structure and the magnetic properties of Cox Ni1-x Cu3 Au (100) films were characterized as functions of thickness and alloy composition. No apparent alloy effect on the crystalline structure was observed with x up to 11%. As the film thickness increases above ∼8 monolayers (ML), the films clearly exhibited a progressively more relaxed structure. Due to the strain relaxation, both the first and the second spin-reorientation transitions (SRT) occurred within 20 ML. The thickness region with perpendicular magnetization was strongly reduced by increasing the Co concentration. For x>10%, no SRT was observed. By combining both the alloy effect and the strain relaxation effect, the SRT boundaries in the phase diagram can be described in a phenomenological model on the basis of magnetoelastics.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number18
Publication statusPublished - 2005 Dec 1


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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