Control of coercivity in exchange-coupled graded (001) FePt: SiO 2 nanocomposite films

Tom A. George; Yongsheng Yu; Lanping Yue; Ralph Skomski; D. J. Sellmyer

doi:10.1109/TMAG.2009.2039554

Control of coercivity in exchange-coupled graded (001) FePt: SiO ₂ nanocomposite films

Tom A. George
, Yongsheng Yu
, Lanping Yue
, Ralph Skomski
, D. J. Sellmyer

University of Nebraska-Lincoln
Harbin Institute of Technology

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

9 Scopus citations

Abstract

We fabricated exchange-coupled composite films with perpendicular anisotropy using nanograins of L1₀ FePt as a magnetically hard base layer and FePt: SiO₂ as a relatively soft phase. The degree of anisotropy and nanostructure in the soft layer was controlled by varying the deposition temperature. Growth of the low-anisotropy layer followed the particulate structure of the base layer at deposition temperatures of 390°C or greater. Perpendicular coercivities were strongly dependent on both the anisotropy and thickness of the softer layer.

Original language	English
Article number	5467575
Pages (from-to)	2435-2437
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	46
Issue number	6
DOIs	https://doi.org/10.1109/TMAG.2009.2039554
State	Published - Jun 2010
Externally published	Yes

Keywords

Coercivity
Exchange-coupled composite
FePt
Perpendicular recording media

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10.1109/TMAG.2009.2039554

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title = "Control of coercivity in exchange-coupled graded (001) FePt: SiO 2 nanocomposite films",

abstract = "We fabricated exchange-coupled composite films with perpendicular anisotropy using nanograins of L10 FePt as a magnetically hard base layer and FePt: SiO2 as a relatively soft phase. The degree of anisotropy and nanostructure in the soft layer was controlled by varying the deposition temperature. Growth of the low-anisotropy layer followed the particulate structure of the base layer at deposition temperatures of 390°C or greater. Perpendicular coercivities were strongly dependent on both the anisotropy and thickness of the softer layer.",

keywords = "Coercivity, Exchange-coupled composite, FePt, Perpendicular recording media",

author = "George, \{Tom A.\} and Yongsheng Yu and Lanping Yue and Ralph Skomski and Sellmyer, \{D. J.\}",

year = "2010",

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doi = "10.1109/TMAG.2009.2039554",

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T2 - SiO 2 nanocomposite films

AU - George, Tom A.

AU - Yu, Yongsheng

AU - Yue, Lanping

AU - Skomski, Ralph

AU - Sellmyer, D. J.

PY - 2010/6

Y1 - 2010/6

N2 - We fabricated exchange-coupled composite films with perpendicular anisotropy using nanograins of L10 FePt as a magnetically hard base layer and FePt: SiO2 as a relatively soft phase. The degree of anisotropy and nanostructure in the soft layer was controlled by varying the deposition temperature. Growth of the low-anisotropy layer followed the particulate structure of the base layer at deposition temperatures of 390°C or greater. Perpendicular coercivities were strongly dependent on both the anisotropy and thickness of the softer layer.

AB - We fabricated exchange-coupled composite films with perpendicular anisotropy using nanograins of L10 FePt as a magnetically hard base layer and FePt: SiO2 as a relatively soft phase. The degree of anisotropy and nanostructure in the soft layer was controlled by varying the deposition temperature. Growth of the low-anisotropy layer followed the particulate structure of the base layer at deposition temperatures of 390°C or greater. Perpendicular coercivities were strongly dependent on both the anisotropy and thickness of the softer layer.

KW - Coercivity

KW - Exchange-coupled composite

KW - FePt

KW - Perpendicular recording media

UR - https://www.scopus.com/pages/publications/77952868658

U2 - 10.1109/TMAG.2009.2039554

DO - 10.1109/TMAG.2009.2039554

M3 - 文章

AN - SCOPUS:77952868658

SN - 0018-9464

VL - 46

SP - 2435

EP - 2437

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 6

M1 - 5467575

ER -

Control of coercivity in exchange-coupled graded (001) FePt: SiO ₂ nanocomposite films

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Keywords

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