Thermal stability and magnetism of Co and Fe ultrathin films on faceted Pd/W{112} surface

Chieh Chen Chiu, Wen-Chin Lin, Ker Jar Song

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Abstract

The study systematically investigates the morphology, element composition, and magnetic properties of Co and Fe films on faceted Pd/W{112} upon thermal annealing. Co thin films aggregate and form 3-dimensional islands at 400-450 K, while the {112} facets are still sustained after further annealing to 900 K. Fe thin films aggregate and form 3-dimensional islands at a lower temperature, 300-350 K, and there is no observable faceted structure after annealing at 300-900 K. The Co and Fe films on Pd/W{112} reveal stable in-plane magnetism at 100 K. The magnetic coercivity (Hc) of Co and Fe films increases and decreases, respectively, when increasing the thickness. The Hc of Co films are significantly enhanced by 2-4 times after annealing at 400-450 K, but the Hc of Fe films remain invariant upon thermal annealing at 400-450 K. These comparative studies of Co and Fe films on faceted Pd/W{112} clearly reveal the significant differences between the two systems and provide valuable information for future applications.

Original languageEnglish
Article number013905
JournalJournal of Applied Physics
Volume115
Issue number1
DOIs
Publication statusPublished - 2014 Jan 7

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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