Magnetoanisotropy, long-range order parameter and thermal stability of isolated L10 FePt nanoparticles with mutual fixed orientation

Kazuhisa Sato; Yoshihiko Hirotsu

doi:10.1016/j.jmmm.2003.12.1044

Magnetoanisotropy, long-range order parameter and thermal stability of isolated L1₀ FePt nanoparticles with mutual fixed orientation

Kazuhisa Sato, Yoshihiko Hirotsu

研究成果: Conference article › 査読

10 被引用数 (Scopus)

抄録

Oriented L1₀-FePt nanoparticles with mean sizes as small as 12nm have been fabricated by electron beam evaporation. Atomic order parameter evaluated was as low as 0.55±0.02 in spite of the long-time annealing as long as 86.4ks at 873K. Magnetoanisotropy constant was estimated to be 1.2-1.4×10⁶J/m³, which was much smaller than that of bulk FePt. Residual magnetization showed a decay of about 3-4% at 300K. The relatively small values of magnetoanisotropy are closely related to the small order parameter, and thought to be responsible for residual magnetization decay at 300K.

本文言語	English
ページ（範囲）	1497-1499
ページ数	3
ジャーナル	Journal of Magnetism and Magnetic Materials
巻	272-276
DOI	https://doi.org/10.1016/j.jmmm.2003.12.1044
出版ステータス	Published - 2004 5月
イベント	Proceedings of the International Conference on Magnetism - Rome, Italy 継続期間: 2003 7月 27 → 2003 8月 1

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学

文献へのアクセス

10.1016/j.jmmm.2003.12.1044

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引用スタイル

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title = "Magnetoanisotropy, long-range order parameter and thermal stability of isolated L10 FePt nanoparticles with mutual fixed orientation",

abstract = "Oriented L10-FePt nanoparticles with mean sizes as small as 12nm have been fabricated by electron beam evaporation. Atomic order parameter evaluated was as low as 0.55±0.02 in spite of the long-time annealing as long as 86.4ks at 873K. Magnetoanisotropy constant was estimated to be 1.2-1.4×106J/m3, which was much smaller than that of bulk FePt. Residual magnetization showed a decay of about 3-4% at 300K. The relatively small values of magnetoanisotropy are closely related to the small order parameter, and thought to be responsible for residual magnetization decay at 300K.",

keywords = "FePt, Magnetoanisotropy, Nanoparticle, Order parameter, Orientation",

author = "Kazuhisa Sato and Yoshihiko Hirotsu",

note = "Funding Information: This study was supported by the COE Program at Osaka University, Grant-in-Aid for Scientific Research and Special Coordination Funds for Promoting Science and Technology on “Nanohetero metallic materials” from the Japanese Ministry of Education, Culture, Sports, Science and Technology.; Proceedings of the International Conference on Magnetism ; Conference date: 27-07-2003 Through 01-08-2003",

year = "2004",

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doi = "10.1016/j.jmmm.2003.12.1044",

language = "English",

volume = "272-276",

pages = "1497--1499",

journal = "Journal of Magnetism and Magnetic Materials",

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TY - JOUR

T1 - Magnetoanisotropy, long-range order parameter and thermal stability of isolated L10 FePt nanoparticles with mutual fixed orientation

AU - Sato, Kazuhisa

AU - Hirotsu, Yoshihiko

N1 - Funding Information: This study was supported by the COE Program at Osaka University, Grant-in-Aid for Scientific Research and Special Coordination Funds for Promoting Science and Technology on “Nanohetero metallic materials” from the Japanese Ministry of Education, Culture, Sports, Science and Technology.

PY - 2004/5

Y1 - 2004/5

N2 - Oriented L10-FePt nanoparticles with mean sizes as small as 12nm have been fabricated by electron beam evaporation. Atomic order parameter evaluated was as low as 0.55±0.02 in spite of the long-time annealing as long as 86.4ks at 873K. Magnetoanisotropy constant was estimated to be 1.2-1.4×106J/m3, which was much smaller than that of bulk FePt. Residual magnetization showed a decay of about 3-4% at 300K. The relatively small values of magnetoanisotropy are closely related to the small order parameter, and thought to be responsible for residual magnetization decay at 300K.

AB - Oriented L10-FePt nanoparticles with mean sizes as small as 12nm have been fabricated by electron beam evaporation. Atomic order parameter evaluated was as low as 0.55±0.02 in spite of the long-time annealing as long as 86.4ks at 873K. Magnetoanisotropy constant was estimated to be 1.2-1.4×106J/m3, which was much smaller than that of bulk FePt. Residual magnetization showed a decay of about 3-4% at 300K. The relatively small values of magnetoanisotropy are closely related to the small order parameter, and thought to be responsible for residual magnetization decay at 300K.

KW - FePt

KW - Magnetoanisotropy

KW - Nanoparticle

KW - Order parameter

KW - Orientation

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

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