Growth and magnetic properties of ultrathin Fe films on Pt(1 1 1)

Y. J. Chen; H. Y. Ho; C. C. Tseng; C. S. Shern

doi:10.1016/j.susc.2007.04.121

Growth and magnetic properties of ultrathin Fe films on Pt(1 1 1)

Y. J. Chen, H. Y. Ho, C. C. Tseng, C. S. Shern^*

^*Corresponding author for this work

Department of Physics

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

9 Citations (Scopus)

Abstract

Auger electron spectroscopy (AES), low-energy electron diffraction (LEED), and surface magneto-optical Kerr effect (SMOKE) were used to investigate the growth mode, alloy formation, and magnetic properties of ultrathin Fe films deposited on Pt(1 1 1) surface. The growth mode of Fe films on Pt(1 1 1) at RT is at least 3 ML layer-by-layer growth before three-dimensional island growth begins. When the thickness of Fe films was 1 ML, no Kerr signal is observed at room temperature. Both the polar and longitudinal Kerr signals can be detected when the thickness of Fe films (d_Fe) is 1.5 ML. When the thickness of Fe films is higher than 1.5 ML, only the longitudinal Kerr signal can be observed. The easy axis of the magnetization is in the in-plane direction when d_Fe > 1.5 ML. After the formation of Fe-Pt surface alloy for 5 ML Fe ultrathin films on a flat Pt(1 1 1) surface, the Kerr signal and the coercivity enhance to 150% and 1100%, respectively. The formation of Fe-Pt surface alloy was confirmed by AES. The evolutions of the magnetic properties are strongly relative to the diffusion process of Fe thin films into Pt substrate.

Original language	English
Pages (from-to)	4334-4338
Number of pages	5
Journal	Surface Science
Volume	601
Issue number	18
DOIs	https://doi.org/10.1016/j.susc.2007.04.121
Publication status	Published - 2007 Sept 15

Keywords

Auger electron spectroscopy
Iron
Low-energy electron diffraction
Magneto-optical Kerr effect
Platinum

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.susc.2007.04.121

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title = "Growth and magnetic properties of ultrathin Fe films on Pt(1 1 1)",

abstract = "Auger electron spectroscopy (AES), low-energy electron diffraction (LEED), and surface magneto-optical Kerr effect (SMOKE) were used to investigate the growth mode, alloy formation, and magnetic properties of ultrathin Fe films deposited on Pt(1 1 1) surface. The growth mode of Fe films on Pt(1 1 1) at RT is at least 3 ML layer-by-layer growth before three-dimensional island growth begins. When the thickness of Fe films was 1 ML, no Kerr signal is observed at room temperature. Both the polar and longitudinal Kerr signals can be detected when the thickness of Fe films (dFe) is 1.5 ML. When the thickness of Fe films is higher than 1.5 ML, only the longitudinal Kerr signal can be observed. The easy axis of the magnetization is in the in-plane direction when dFe > 1.5 ML. After the formation of Fe-Pt surface alloy for 5 ML Fe ultrathin films on a flat Pt(1 1 1) surface, the Kerr signal and the coercivity enhance to 150% and 1100%, respectively. The formation of Fe-Pt surface alloy was confirmed by AES. The evolutions of the magnetic properties are strongly relative to the diffusion process of Fe thin films into Pt substrate.",

keywords = "Auger electron spectroscopy, Iron, Low-energy electron diffraction, Magneto-optical Kerr effect, Platinum",

author = "Chen, {Y. J.} and Ho, {H. Y.} and Tseng, {C. C.} and Shern, {C. S.}",

note = "Funding Information: This research was supported by the National Science Council of the Republic of China under Grant Number NSC 95-2112-M-003-008. ",

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AU - Chen, Y. J.

AU - Ho, H. Y.

AU - Tseng, C. C.

AU - Shern, C. S.

N1 - Funding Information: This research was supported by the National Science Council of the Republic of China under Grant Number NSC 95-2112-M-003-008.

PY - 2007/9/15

Y1 - 2007/9/15

N2 - Auger electron spectroscopy (AES), low-energy electron diffraction (LEED), and surface magneto-optical Kerr effect (SMOKE) were used to investigate the growth mode, alloy formation, and magnetic properties of ultrathin Fe films deposited on Pt(1 1 1) surface. The growth mode of Fe films on Pt(1 1 1) at RT is at least 3 ML layer-by-layer growth before three-dimensional island growth begins. When the thickness of Fe films was 1 ML, no Kerr signal is observed at room temperature. Both the polar and longitudinal Kerr signals can be detected when the thickness of Fe films (dFe) is 1.5 ML. When the thickness of Fe films is higher than 1.5 ML, only the longitudinal Kerr signal can be observed. The easy axis of the magnetization is in the in-plane direction when dFe > 1.5 ML. After the formation of Fe-Pt surface alloy for 5 ML Fe ultrathin films on a flat Pt(1 1 1) surface, the Kerr signal and the coercivity enhance to 150% and 1100%, respectively. The formation of Fe-Pt surface alloy was confirmed by AES. The evolutions of the magnetic properties are strongly relative to the diffusion process of Fe thin films into Pt substrate.

AB - Auger electron spectroscopy (AES), low-energy electron diffraction (LEED), and surface magneto-optical Kerr effect (SMOKE) were used to investigate the growth mode, alloy formation, and magnetic properties of ultrathin Fe films deposited on Pt(1 1 1) surface. The growth mode of Fe films on Pt(1 1 1) at RT is at least 3 ML layer-by-layer growth before three-dimensional island growth begins. When the thickness of Fe films was 1 ML, no Kerr signal is observed at room temperature. Both the polar and longitudinal Kerr signals can be detected when the thickness of Fe films (dFe) is 1.5 ML. When the thickness of Fe films is higher than 1.5 ML, only the longitudinal Kerr signal can be observed. The easy axis of the magnetization is in the in-plane direction when dFe > 1.5 ML. After the formation of Fe-Pt surface alloy for 5 ML Fe ultrathin films on a flat Pt(1 1 1) surface, the Kerr signal and the coercivity enhance to 150% and 1100%, respectively. The formation of Fe-Pt surface alloy was confirmed by AES. The evolutions of the magnetic properties are strongly relative to the diffusion process of Fe thin films into Pt substrate.

KW - Auger electron spectroscopy

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KW - Low-energy electron diffraction

KW - Magneto-optical Kerr effect

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Growth and magnetic properties of ultrathin Fe films on Pt(1 1 1)

Abstract

Keywords

ASJC Scopus subject areas

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