Effect of substrate inclination on the magnetic anisotropy of ultrathin Fe films grown on Al 2O 3(0001)

Yu Shiratsuchi; Yasushi Endo; Masahiko Yamamoto; S. D. Bader

doi:10.1063/1.1850075

Effect of substrate inclination on the magnetic anisotropy of ultrathin Fe films grown on Al ₂O ₃(0001)

Yu Shiratsuchi, Yasushi Endo, Masahiko Yamamoto, S. D. Bader

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

11 Citations (Scopus)

Abstract

We have investigated the effect of substrate inclination on the in-plane magnetic anisotropy of ultrathin Fe films grown on Al2 O3 (0001). For Fe films grown on flat Al2 O3 substrates, no preferred direction of magnetization exists in the film plane due to the three equivalent epitaxial orientations of Fe(110) that form. However, for Fe grown on an inclined Al2 O3 substrate, a uniaxial anisotropy appears that is parallel to the step edges. The anisotropy increases in magnitude with decreasing Fe thickness and growth temperature, and as the surface morphology changes from being rough to being smooth. We attribute the uniaxial anisotropy to the effective demagnetization field caused by the surface corrugation.

Original language	English
Article number	10J106
Journal	Journal of Applied Physics
Volume	97
Issue number	10
DOIs	https://doi.org/10.1063/1.1850075
Publication status	Published - 2005 May 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Effect of substrate inclination on the magnetic anisotropy of ultrathin Fe films grown on Al 2O 3(0001)",

abstract = "We have investigated the effect of substrate inclination on the in-plane magnetic anisotropy of ultrathin Fe films grown on Al2 O3 (0001). For Fe films grown on flat Al2 O3 substrates, no preferred direction of magnetization exists in the film plane due to the three equivalent epitaxial orientations of Fe(110) that form. However, for Fe grown on an inclined Al2 O3 substrate, a uniaxial anisotropy appears that is parallel to the step edges. The anisotropy increases in magnitude with decreasing Fe thickness and growth temperature, and as the surface morphology changes from being rough to being smooth. We attribute the uniaxial anisotropy to the effective demagnetization field caused by the surface corrugation.",

author = "Yu Shiratsuchi and Yasushi Endo and Masahiko Yamamoto and Bader, {S. D.}",

note = "Funding Information: This work is partially supported by a Grant-in-Aid for General Scientific Research (S) and Exploratory Research from the Japanese Ministry of Education, Culture, Sports, Science and Technology. This work is also partially supported by “Priority Assistance of the Formation of Worldwide Renowned Centers of Research—The 21st Century COE Program (Project: Center of Excellence for Advanced Structural and Functional Materials Design)” from the Japanese Ministry of Education, Sports, Culture, Science and Technology. Work at Argonne was supported by the U.S. Department of Energy, Basic Energy Sciences-Materials Sciences under Contract No. W-31-109-ENG-38.",

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AU - Shiratsuchi, Yu

AU - Endo, Yasushi

AU - Yamamoto, Masahiko

AU - Bader, S. D.

N1 - Funding Information: This work is partially supported by a Grant-in-Aid for General Scientific Research (S) and Exploratory Research from the Japanese Ministry of Education, Culture, Sports, Science and Technology. This work is also partially supported by “Priority Assistance of the Formation of Worldwide Renowned Centers of Research—The 21st Century COE Program (Project: Center of Excellence for Advanced Structural and Functional Materials Design)” from the Japanese Ministry of Education, Sports, Culture, Science and Technology. Work at Argonne was supported by the U.S. Department of Energy, Basic Energy Sciences-Materials Sciences under Contract No. W-31-109-ENG-38.

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N2 - We have investigated the effect of substrate inclination on the in-plane magnetic anisotropy of ultrathin Fe films grown on Al2 O3 (0001). For Fe films grown on flat Al2 O3 substrates, no preferred direction of magnetization exists in the film plane due to the three equivalent epitaxial orientations of Fe(110) that form. However, for Fe grown on an inclined Al2 O3 substrate, a uniaxial anisotropy appears that is parallel to the step edges. The anisotropy increases in magnitude with decreasing Fe thickness and growth temperature, and as the surface morphology changes from being rough to being smooth. We attribute the uniaxial anisotropy to the effective demagnetization field caused by the surface corrugation.

AB - We have investigated the effect of substrate inclination on the in-plane magnetic anisotropy of ultrathin Fe films grown on Al2 O3 (0001). For Fe films grown on flat Al2 O3 substrates, no preferred direction of magnetization exists in the film plane due to the three equivalent epitaxial orientations of Fe(110) that form. However, for Fe grown on an inclined Al2 O3 substrate, a uniaxial anisotropy appears that is parallel to the step edges. The anisotropy increases in magnitude with decreasing Fe thickness and growth temperature, and as the surface morphology changes from being rough to being smooth. We attribute the uniaxial anisotropy to the effective demagnetization field caused by the surface corrugation.

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