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Appearance of ferromagnetism in Pt(100) ultrathin films originated from quantum-well states

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arxiv 2101.02818 v4 pith:4BGDBLQF submitted 2021-01-08 cond-mat.mtrl-sci

Appearance of ferromagnetism in Pt(100) ultrathin films originated from quantum-well states

Tatsuru Yamada , Keisuke Ochiai , Hirofumi Kinoshita , Shunsuke Sakuragi , Motohiro Suzuki , Hitoshi Osawa , Hiroyuki Kageshima , Tetsuya Sato This is my paper
classification cond-mat.mtrl-sci
keywords ferromagnetismfilmmagneticappearancefilmsperiodquantum-wellresults
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Ferromagnetism was observed in a Pt(100) ultrathin film deposited on a SrTiO3(100) substrate. The ferromagnetism, which appears in films with thicknesses of 2.2-4.4 nm, periodically changes with a period of approximately 1 nm (5-6 monolayers) depending on the film thickness. This is consistent with the period derived from the quantum-well states formed in the thin film. X-ray magnetic circular dichroism measurements show the evidence of appearance of intrinsic ferromagnetism in Pt(100) ultra-thin film. In addition, present results suggest a possibility that the orbital magnetic moment of pure Pt is much smaller than that of the Pt/ferromagnetic multilayer system. These results will provide a potential new mechanism for origin of the large magnetic anisotropy in Pt components.

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