Perpendicular magnetic anisotropic characteristics of amorphous [CoSiB/Pt]N multilayers

E. H.M. Van Der Heijden; K. J. Lee; Y. H. Choi; T. W. Kim; H. J.M. Swagten; C. Y. You; M. H. Jung

doi:10.1063/1.4795310

Perpendicular magnetic anisotropic characteristics of amorphous [CoSiB/Pt]_N multilayers

E. H.M. Van Der Heijden, K. J. Lee, Y. H. Choi, T. W. Kim, H. J.M. Swagten, C. Y. You, M. H. Jung

Department of Physics and Chemistry

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Abstract

The perpendicular magnetic anisotropic properties of amorphous multilayers of [CoSiB/Pt]_N are investigated as functions of the thickness of magnetic layers (t_CoSiB =4 and 6 Å) and the number of repeated bilayers (N =3 ∼ 20). Even though the magnetization reversal process is dominated by the wall motion of magnetic domains rather than the nucleation for all the values of t_CoSiB and N in our experiment, the changes of magnetic properties are strongly dependent on the t_CoSiB and N values. The effective anisotropy constant for the 6 Å sample is K ₁^eff=1.2 × 10⁶ erg/cm³, which is a factor of 6 larger than that for the 4 Å sample. The coercivity variations as a function of N are explained by the Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between the magnetic layers considering the balance of domain wall energy and magnetostatic energy.

Original language	English
Article number	102410
Journal	Applied Physics Letters
Volume	102
Issue number	10
DOIs	https://doi.org/10.1063/1.4795310
State	Published - 11 Mar 2013

Bibliographical note

Funding Information:
This work was supported by the IT R&D program of MKE/KEIT [10043398].

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@article{6fe28c06abca40db9ce953086e84fd14,

title = "Perpendicular magnetic anisotropic characteristics of amorphous [CoSiB/Pt]N multilayers",

abstract = "The perpendicular magnetic anisotropic properties of amorphous multilayers of [CoSiB/Pt]N are investigated as functions of the thickness of magnetic layers (tCoSiB =4 and 6 {\AA}) and the number of repeated bilayers (N =3 ∼ 20). Even though the magnetization reversal process is dominated by the wall motion of magnetic domains rather than the nucleation for all the values of tCoSiB and N in our experiment, the changes of magnetic properties are strongly dependent on the tCoSiB and N values. The effective anisotropy constant for the 6 {\AA} sample is K 1eff=1.2 × 106 erg/cm3, which is a factor of 6 larger than that for the 4 {\AA} sample. The coercivity variations as a function of N are explained by the Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between the magnetic layers considering the balance of domain wall energy and magnetostatic energy.",

author = "{Van Der Heijden}, {E. H.M.} and Lee, {K. J.} and Choi, {Y. H.} and Kim, {T. W.} and Swagten, {H. J.M.} and You, {C. Y.} and Jung, {M. H.}",

note = "Funding Information: This work was supported by the IT R&D program of MKE/KEIT [10043398].",

year = "2013",

month = mar,

day = "11",

doi = "10.1063/1.4795310",

language = "English",

volume = "102",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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T1 - Perpendicular magnetic anisotropic characteristics of amorphous [CoSiB/Pt]N multilayers

AU - Van Der Heijden, E. H.M.

AU - Lee, K. J.

AU - Choi, Y. H.

AU - Kim, T. W.

AU - Swagten, H. J.M.

AU - You, C. Y.

AU - Jung, M. H.

N1 - Funding Information: This work was supported by the IT R&D program of MKE/KEIT [10043398].

PY - 2013/3/11

Y1 - 2013/3/11

N2 - The perpendicular magnetic anisotropic properties of amorphous multilayers of [CoSiB/Pt]N are investigated as functions of the thickness of magnetic layers (tCoSiB =4 and 6 Å) and the number of repeated bilayers (N =3 ∼ 20). Even though the magnetization reversal process is dominated by the wall motion of magnetic domains rather than the nucleation for all the values of tCoSiB and N in our experiment, the changes of magnetic properties are strongly dependent on the tCoSiB and N values. The effective anisotropy constant for the 6 Å sample is K 1eff=1.2 × 106 erg/cm3, which is a factor of 6 larger than that for the 4 Å sample. The coercivity variations as a function of N are explained by the Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between the magnetic layers considering the balance of domain wall energy and magnetostatic energy.

AB - The perpendicular magnetic anisotropic properties of amorphous multilayers of [CoSiB/Pt]N are investigated as functions of the thickness of magnetic layers (tCoSiB =4 and 6 Å) and the number of repeated bilayers (N =3 ∼ 20). Even though the magnetization reversal process is dominated by the wall motion of magnetic domains rather than the nucleation for all the values of tCoSiB and N in our experiment, the changes of magnetic properties are strongly dependent on the tCoSiB and N values. The effective anisotropy constant for the 6 Å sample is K 1eff=1.2 × 106 erg/cm3, which is a factor of 6 larger than that for the 4 Å sample. The coercivity variations as a function of N are explained by the Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between the magnetic layers considering the balance of domain wall energy and magnetostatic energy.

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U2 - 10.1063/1.4795310

DO - 10.1063/1.4795310

M3 - Article

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VL - 102

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 10

M1 - 102410

ER -

Perpendicular magnetic anisotropic characteristics of amorphous [CoSiB/Pt]_N multilayers

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