Strong perpendicular magnetic anisotropy of Pt/Co/AlN structure

Young Chan Won; Jae Pyoung Ahn; Sang Ho Lim

doi:10.1016/j.jallcom.2022.165514

Strong perpendicular magnetic anisotropy of Pt/Co/AlN structure

Young Chan Won, Jae Pyoung Ahn, Sang Ho Lim

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

3 Citations (Scopus)

Abstract

In this study, the perpendicular magnetic anisotropy (PMA) and microstructure of Pt/Co/AlN stacks were investigated. At a Co thickness of 0.5 nm, the magnetic moment was not observed in the as-deposited state, but after annealing, it increased significantly. Furthermore, a strong PMA was obtained in the annealed samples; after annealing at 300 °C and 400 °C, the effective PMA energy densities were 2.28 and 1.96 × 10⁷ erg/cm³, respectively. Similar behavior was observed for samples with thicker Co layers. The magnetic dead layer and interfacial PMA energy density were also investigated to determine the interfacial effects on PMA. The occurrence of strong PMA was supported by high-resolution cross-sectional transmission electron microscopy results, demonstrating a well-defined layered structure for the annealed Pt/Co/AlN samples.

Original language	English
Article number	165514
Journal	Journal of Alloys and Compounds
Volume	918
DOIs	https://doi.org/10.1016/j.jallcom.2022.165514
Publication status	Published - 2022 Oct 15

Bibliographical note

Funding Information:
This work was supported by the Creative Materials Discovery Program through the National Research Foundation of Korea [grant number 2015M3D1A1070465 ].

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

Magnetic thin films
Perpendicular magnetic anisotropy
Pt/Co/AlN trilayers

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2022.165514

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title = "Strong perpendicular magnetic anisotropy of Pt/Co/AlN structure",

abstract = "In this study, the perpendicular magnetic anisotropy (PMA) and microstructure of Pt/Co/AlN stacks were investigated. At a Co thickness of 0.5 nm, the magnetic moment was not observed in the as-deposited state, but after annealing, it increased significantly. Furthermore, a strong PMA was obtained in the annealed samples; after annealing at 300 °C and 400 °C, the effective PMA energy densities were 2.28 and 1.96 × 107 erg/cm3, respectively. Similar behavior was observed for samples with thicker Co layers. The magnetic dead layer and interfacial PMA energy density were also investigated to determine the interfacial effects on PMA. The occurrence of strong PMA was supported by high-resolution cross-sectional transmission electron microscopy results, demonstrating a well-defined layered structure for the annealed Pt/Co/AlN samples.",

keywords = "Magnetic thin films, Perpendicular magnetic anisotropy, Pt/Co/AlN trilayers",

author = "Won, {Young Chan} and Ahn, {Jae Pyoung} and Lim, {Sang Ho}",

note = "Funding Information: This work was supported by the Creative Materials Discovery Program through the National Research Foundation of Korea [grant number 2015M3D1A1070465 ]. Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

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doi = "10.1016/j.jallcom.2022.165514",

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T1 - Strong perpendicular magnetic anisotropy of Pt/Co/AlN structure

AU - Won, Young Chan

AU - Ahn, Jae Pyoung

AU - Lim, Sang Ho

N1 - Funding Information: This work was supported by the Creative Materials Discovery Program through the National Research Foundation of Korea [grant number 2015M3D1A1070465 ]. Publisher Copyright: © 2022 Elsevier B.V.

PY - 2022/10/15

Y1 - 2022/10/15

N2 - In this study, the perpendicular magnetic anisotropy (PMA) and microstructure of Pt/Co/AlN stacks were investigated. At a Co thickness of 0.5 nm, the magnetic moment was not observed in the as-deposited state, but after annealing, it increased significantly. Furthermore, a strong PMA was obtained in the annealed samples; after annealing at 300 °C and 400 °C, the effective PMA energy densities were 2.28 and 1.96 × 107 erg/cm3, respectively. Similar behavior was observed for samples with thicker Co layers. The magnetic dead layer and interfacial PMA energy density were also investigated to determine the interfacial effects on PMA. The occurrence of strong PMA was supported by high-resolution cross-sectional transmission electron microscopy results, demonstrating a well-defined layered structure for the annealed Pt/Co/AlN samples.

AB - In this study, the perpendicular magnetic anisotropy (PMA) and microstructure of Pt/Co/AlN stacks were investigated. At a Co thickness of 0.5 nm, the magnetic moment was not observed in the as-deposited state, but after annealing, it increased significantly. Furthermore, a strong PMA was obtained in the annealed samples; after annealing at 300 °C and 400 °C, the effective PMA energy densities were 2.28 and 1.96 × 107 erg/cm3, respectively. Similar behavior was observed for samples with thicker Co layers. The magnetic dead layer and interfacial PMA energy density were also investigated to determine the interfacial effects on PMA. The occurrence of strong PMA was supported by high-resolution cross-sectional transmission electron microscopy results, demonstrating a well-defined layered structure for the annealed Pt/Co/AlN samples.

KW - Magnetic thin films

KW - Perpendicular magnetic anisotropy

KW - Pt/Co/AlN trilayers

UR - http://www.scopus.com/inward/record.url?scp=85131454739&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2022.165514

DO - 10.1016/j.jallcom.2022.165514

M3 - Article

AN - SCOPUS:85131454739

SN - 0925-8388

VL - 918

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 165514

ER -

Strong perpendicular magnetic anisotropy of Pt/Co/AlN structure

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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