Interface study of ion irradiated Cu/Ni/Cu(0 0 2)/Si magnetic thin film by X-ray reflectivity

T. G. Kim, J. H. Lee, J. H. Song, K. H. Chae, S. W. Shin, H. M. Hwang, J. Lee, KwangHo Jeong, C. N. Whang, J. S. Lee, K. B. Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The irradiation effect of 1 MeV C + on the interface and magnetic anisotropy of epitaxial Cu/Ni system with a perpendicular magnetic anisotropy was investigated by using magneto-optical Kerr effects, grazing incident diffraction and X-ray reflectivity. The magnetic easy-axis was altered from the direction along the surface normal to in-plane and the strain in the Ni layer was relaxed after ion irradiation. Though the interface between the top Cu layer and the Ni layer becomes rough, the contrast of electron densities of Cu and Ni layer increases and the grain-growth occurs during ion irradiation. These phenomena arise from thermo-chemical driving force, i.e. heat of formation, which may be a crucial factor in determining the interface shape in the case of indirect energy transfer mechanism. Therefore, the change of the magnetic anisotropy of the Ni/Cu system after ion irradiation is not due to the formation of the intermixed layer at the interface. The ion irradiation effects on the grain-growth and enhancement of the electronic contrast between Ni and Cu are explained by the interfacial atomic movement caused by thermo-chemical driving force.

Original languageEnglish
Pages (from-to)105-111
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume299
Issue number1
DOIs
Publication statusPublished - 2006 Apr 1

Fingerprint

Magnetic thin films
Ion bombardment
Magnetic anisotropy
ion irradiation
Ions
reflectance
X rays
thin films
Grain growth
ions
x rays
anisotropy
Optical Kerr effect
Energy transfer
plane strain
Carrier concentration
grazing
heat of formation
Kerr effects
Diffraction

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Kim, T. G., Lee, J. H., Song, J. H., Chae, K. H., Shin, S. W., Hwang, H. M., ... Lee, K. B. (2006). Interface study of ion irradiated Cu/Ni/Cu(0 0 2)/Si magnetic thin film by X-ray reflectivity. Journal of Magnetism and Magnetic Materials, 299(1), 105-111. https://doi.org/10.1016/j.jmmm.2005.03.096
Kim, T. G. ; Lee, J. H. ; Song, J. H. ; Chae, K. H. ; Shin, S. W. ; Hwang, H. M. ; Lee, J. ; Jeong, KwangHo ; Whang, C. N. ; Lee, J. S. ; Lee, K. B. / Interface study of ion irradiated Cu/Ni/Cu(0 0 2)/Si magnetic thin film by X-ray reflectivity. In: Journal of Magnetism and Magnetic Materials. 2006 ; Vol. 299, No. 1. pp. 105-111.
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abstract = "The irradiation effect of 1 MeV C + on the interface and magnetic anisotropy of epitaxial Cu/Ni system with a perpendicular magnetic anisotropy was investigated by using magneto-optical Kerr effects, grazing incident diffraction and X-ray reflectivity. The magnetic easy-axis was altered from the direction along the surface normal to in-plane and the strain in the Ni layer was relaxed after ion irradiation. Though the interface between the top Cu layer and the Ni layer becomes rough, the contrast of electron densities of Cu and Ni layer increases and the grain-growth occurs during ion irradiation. These phenomena arise from thermo-chemical driving force, i.e. heat of formation, which may be a crucial factor in determining the interface shape in the case of indirect energy transfer mechanism. Therefore, the change of the magnetic anisotropy of the Ni/Cu system after ion irradiation is not due to the formation of the intermixed layer at the interface. The ion irradiation effects on the grain-growth and enhancement of the electronic contrast between Ni and Cu are explained by the interfacial atomic movement caused by thermo-chemical driving force.",
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Kim, TG, Lee, JH, Song, JH, Chae, KH, Shin, SW, Hwang, HM, Lee, J, Jeong, K, Whang, CN, Lee, JS & Lee, KB 2006, 'Interface study of ion irradiated Cu/Ni/Cu(0 0 2)/Si magnetic thin film by X-ray reflectivity', Journal of Magnetism and Magnetic Materials, vol. 299, no. 1, pp. 105-111. https://doi.org/10.1016/j.jmmm.2005.03.096

Interface study of ion irradiated Cu/Ni/Cu(0 0 2)/Si magnetic thin film by X-ray reflectivity. / Kim, T. G.; Lee, J. H.; Song, J. H.; Chae, K. H.; Shin, S. W.; Hwang, H. M.; Lee, J.; Jeong, KwangHo; Whang, C. N.; Lee, J. S.; Lee, K. B.

In: Journal of Magnetism and Magnetic Materials, Vol. 299, No. 1, 01.04.2006, p. 105-111.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Interface study of ion irradiated Cu/Ni/Cu(0 0 2)/Si magnetic thin film by X-ray reflectivity

AU - Kim, T. G.

AU - Lee, J. H.

AU - Song, J. H.

AU - Chae, K. H.

AU - Shin, S. W.

AU - Hwang, H. M.

AU - Lee, J.

AU - Jeong, KwangHo

AU - Whang, C. N.

AU - Lee, J. S.

AU - Lee, K. B.

PY - 2006/4/1

Y1 - 2006/4/1

N2 - The irradiation effect of 1 MeV C + on the interface and magnetic anisotropy of epitaxial Cu/Ni system with a perpendicular magnetic anisotropy was investigated by using magneto-optical Kerr effects, grazing incident diffraction and X-ray reflectivity. The magnetic easy-axis was altered from the direction along the surface normal to in-plane and the strain in the Ni layer was relaxed after ion irradiation. Though the interface between the top Cu layer and the Ni layer becomes rough, the contrast of electron densities of Cu and Ni layer increases and the grain-growth occurs during ion irradiation. These phenomena arise from thermo-chemical driving force, i.e. heat of formation, which may be a crucial factor in determining the interface shape in the case of indirect energy transfer mechanism. Therefore, the change of the magnetic anisotropy of the Ni/Cu system after ion irradiation is not due to the formation of the intermixed layer at the interface. The ion irradiation effects on the grain-growth and enhancement of the electronic contrast between Ni and Cu are explained by the interfacial atomic movement caused by thermo-chemical driving force.

AB - The irradiation effect of 1 MeV C + on the interface and magnetic anisotropy of epitaxial Cu/Ni system with a perpendicular magnetic anisotropy was investigated by using magneto-optical Kerr effects, grazing incident diffraction and X-ray reflectivity. The magnetic easy-axis was altered from the direction along the surface normal to in-plane and the strain in the Ni layer was relaxed after ion irradiation. Though the interface between the top Cu layer and the Ni layer becomes rough, the contrast of electron densities of Cu and Ni layer increases and the grain-growth occurs during ion irradiation. These phenomena arise from thermo-chemical driving force, i.e. heat of formation, which may be a crucial factor in determining the interface shape in the case of indirect energy transfer mechanism. Therefore, the change of the magnetic anisotropy of the Ni/Cu system after ion irradiation is not due to the formation of the intermixed layer at the interface. The ion irradiation effects on the grain-growth and enhancement of the electronic contrast between Ni and Cu are explained by the interfacial atomic movement caused by thermo-chemical driving force.

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M3 - Article

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EP - 111

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

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