Depression of the coercive force via oxygen exposure of ultrathin Fe/Pt(111) films

Huei Ying Ho; Ying Chen Lee; Jyh Shen Tsay

doi:10.1109/TMAG.2010.2044479

Depression of the coercive force via oxygen exposure of ultrathin Fe/Pt(111) films

Huei Ying Ho, Ying Chen Lee, Jyh Shen Tsay^*

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The composition and magnetic properties of Fe/Pt(111) after oxygen exposure were investigated. At room temperature the amount of adsorbed oxygen on the surface increased as oxygen exposure also increased until saturation. For Fe/Pt(111) that were thinner than two monolayers, the oxidative process dominated the initial oxygen exposure. In case of thicker Fe, the physical adsorption was more important. Due to the ferromagnetic properties of the iron oxides (α-Fe₂O₃), the Kerr hysteresis loops experienced a slight change. We estimated that the diffusion length of oxygen atoms into the Fe films were approximately three monolayers. Under saturated oxygen exposure, the formation of iron oxide hindered the formation of ordered Fe-Pt alloys and results in a depression on the coercive force.

Original language	English
Article number	5467457
Pages (from-to)	1360-1362
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	46
Issue number	6
DOIs	https://doi.org/10.1109/TMAG.2010.2044479
Publication status	Published - 2010 Jun

Keywords

Coercive force
Iron alloy
Oxidation
Platinum
Ultrathin film

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2010.2044479

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abstract = "The composition and magnetic properties of Fe/Pt(111) after oxygen exposure were investigated. At room temperature the amount of adsorbed oxygen on the surface increased as oxygen exposure also increased until saturation. For Fe/Pt(111) that were thinner than two monolayers, the oxidative process dominated the initial oxygen exposure. In case of thicker Fe, the physical adsorption was more important. Due to the ferromagnetic properties of the iron oxides (α-Fe2O3), the Kerr hysteresis loops experienced a slight change. We estimated that the diffusion length of oxygen atoms into the Fe films were approximately three monolayers. Under saturated oxygen exposure, the formation of iron oxide hindered the formation of ordered Fe-Pt alloys and results in a depression on the coercive force.",

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AU - Ho, Huei Ying

AU - Lee, Ying Chen

AU - Tsay, Jyh Shen

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Y1 - 2010/6

N2 - The composition and magnetic properties of Fe/Pt(111) after oxygen exposure were investigated. At room temperature the amount of adsorbed oxygen on the surface increased as oxygen exposure also increased until saturation. For Fe/Pt(111) that were thinner than two monolayers, the oxidative process dominated the initial oxygen exposure. In case of thicker Fe, the physical adsorption was more important. Due to the ferromagnetic properties of the iron oxides (α-Fe2O3), the Kerr hysteresis loops experienced a slight change. We estimated that the diffusion length of oxygen atoms into the Fe films were approximately three monolayers. Under saturated oxygen exposure, the formation of iron oxide hindered the formation of ordered Fe-Pt alloys and results in a depression on the coercive force.

AB - The composition and magnetic properties of Fe/Pt(111) after oxygen exposure were investigated. At room temperature the amount of adsorbed oxygen on the surface increased as oxygen exposure also increased until saturation. For Fe/Pt(111) that were thinner than two monolayers, the oxidative process dominated the initial oxygen exposure. In case of thicker Fe, the physical adsorption was more important. Due to the ferromagnetic properties of the iron oxides (α-Fe2O3), the Kerr hysteresis loops experienced a slight change. We estimated that the diffusion length of oxygen atoms into the Fe films were approximately three monolayers. Under saturated oxygen exposure, the formation of iron oxide hindered the formation of ordered Fe-Pt alloys and results in a depression on the coercive force.

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KW - Iron alloy

KW - Oxidation

KW - Platinum

KW - Ultrathin film

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Depression of the coercive force via oxygen exposure of ultrathin Fe/Pt(111) films

Abstract

Keywords

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