Effects of interfacial structure on the magnetic properties of ultrathin Fe/Pt(111) films with Ag buffer layer |
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| Authors: | Yao-Jung ChenChi-Ching Chang Huei-Ying HoJyh-Shen Tsay |
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| Affiliation: | a Department of Computer and Communication Engineering, Taipei College of Maritime Technology, 212, Sec. 9, Yan-Pin N. Road, Taipei 111, Taiwanb Department of Physics, National Taiwan Normal University, 88, Sec. 4, Ting-Chou Road, Taipei 116, Taiwanc Department of Science Education, National Taipei University of Education, 134, Sec. 2, Heping E. Road, Taipei 106, Taiwan |
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| Abstract: | For Fe/Pt(111) grown at 180 K, the easy axis of magnetization changes from out-of-plane to in-plane while the surface structure changes from fcc(111) to bcc(110). The Curie temperature for 1 ML Fe/Pt(111) is close to room temperature. After insertion of submonolayer Ag, no significant change for the Curie temperature is observed. By thermally annealing Ag/Pt(111) at 550 K to form a Ag-Pt surface alloy, we demonstrate that the Curie temperature of the deposited Fe films is elevated to be higher than room temperature. For an ultrathin Fe/Ag/Fe/Pt(111) sandwich system, the strong interaction between the two Fe layers is superior due to the effect of the double Fe/Ag interfaces. This causes that the easy axis of the magnetization switches back to the in-plane direction during the deposition of Fe overlayer on the surface of a Ag/Fe/Pt(111) film. |
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| Keywords: | Magneto-optic Kerr effect Spin-reorientation transition Surface alloy Fe Ag |
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