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arXiv · 2101.02818

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
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Abstract

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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Tatsuru Yamada, Keisuke Ochiai, Hirofumi Kinoshita, Shunsuke Sakuragi, Motohiro Suzuki, Hitoshi Osawa, Hiroyuki Kageshima, Tetsuya Sato. 2021-01-08. Appearance of ferromagnetism in Pt(100) ultrathin films originated from quantum-well states. https://doi.org/10.7566/jpsj.91.124708

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