摘要
The comparative study in structural properties for the mirror systems, 1 ML Ni/1 ML CoPt (111) and 1 ML Co/1 ML NiPt (111) surface ordered alloys, reveals a structural phase transition from Nix Co1-x Pt to Nix Co1-x Pt3 ordered surface alloy when the annealing temperature is between 750 and 800 K. The Curie temperature speeds up to decrease when the surface structure changes from Nix Co1-x Pt to Nix Co1-x Pt3. The value of critical exponent Β near the Curie point crosses from a two-dimensional-like magnetic phase to a three-dimensional-like one after the phase transition. From the composition dependence of the Curie temperature, one can adjust the Curie temperatures of the surface alloy by controlling the annealing temperature.
原文 | 英語 |
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文章編號 | 142505 |
期刊 | Applied Physics Letters |
卷 | 90 |
發行號 | 14 |
DOIs | |
出版狀態 | 已發佈 - 2007 |
ASJC Scopus subject areas
- 物理與天文學(雜項)