Strong uniaxial magnetic anisotropy in triangular wave-like ferromagnetic NiFe thin films

Sanghoon Ki; Joonghoe Dho

doi:10.1063/1.4921784

Strong uniaxial magnetic anisotropy in triangular wave-like ferromagnetic NiFe thin films

Sanghoon Ki, Joonghoe Dho

Department of Physics

Kyungpook National University

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

26 Scopus citations

Abstract

Triangular wave-like NiFe films were synthesized on m-plane Al₂O₃ with a triangularly rippled surface and their uniaxial magnetic anisotropies were investigated as a function of the average wavelength (λ). The ratio of the oscillation height to λ was approximately maintained at ∼0.133. A large magnetic anisotropy energy of 80-150 kJ/m³, which is up to ten times larger than the reported values, was observed with the variation of λ. The increasing tendency of the anisotropy energy with decreasing λ is likely due to a change in the shape anisotropy, while the anisotropy energy generated by surface magnetic charges slightly increased with increasing λ.

Original language	English
Article number	212404
Journal	Applied Physics Letters
Volume	106
Issue number	21
DOIs	https://doi.org/10.1063/1.4921784
State	Published - 25 May 2015

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abstract = "Triangular wave-like NiFe films were synthesized on m-plane Al2O3 with a triangularly rippled surface and their uniaxial magnetic anisotropies were investigated as a function of the average wavelength (λ). The ratio of the oscillation height to λ was approximately maintained at ∼0.133. A large magnetic anisotropy energy of 80-150 kJ/m3, which is up to ten times larger than the reported values, was observed with the variation of λ. The increasing tendency of the anisotropy energy with decreasing λ is likely due to a change in the shape anisotropy, while the anisotropy energy generated by surface magnetic charges slightly increased with increasing λ.",

author = "Sanghoon Ki and Joonghoe Dho",

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AU - Dho, Joonghoe

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Strong uniaxial magnetic anisotropy in triangular wave-like ferromagnetic NiFe thin films

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