Magnetization reversal process in FePt L10 nanoparticles

S. Okamoto; Nobuaki Kikuchi; O. Kitakami; Y. Shimada

doi:10.1016/j.scriptamat.2005.04.034

Magnetization reversal process in FePt L10 nanoparticles

S. Okamoto, Nobuaki Kikuchi, O. Kitakami, Y. Shimada

Faculty of Science and Technology

Research output: Contribution to journal › Article › Academic

11 Citations (Scopus)

Abstract

We have studied the magnetization reversals of FePt L10 particles. Lithographically fabricated single FePt particles and well isolated epitaxial FePt L10 nanoparticles have been investigated for a wide range of particle diameters D. Careful analyses of the experiments have revealed that for particles larger than 20 nm the magnetization reversal behaviors are governed by either nucleation or expansion of a reversed domain depending on the temperature, and the coherent rotation mode becomes dominant for D<20 nm.

Original language	Undefined
Pages (from-to)	395-401
Journal	Journal of magnetism and magnetic materials
Volume	53
Issue number	4
DOIs	https://doi.org/10.1016/j.scriptamat.2005.04.034
Publication status	Published - 2005

Keywords

Magnetic thin films
Magnetic recording
Magnetic anisotropy
IR-77407
Iron alloys
Platinum-group

Access to Document

10.1016/j.scriptamat.2005.04.034

Cite this

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title = "Magnetization reversal process in FePt L10 nanoparticles",

abstract = "We have studied the magnetization reversals of FePt L10 particles. Lithographically fabricated single FePt particles and well isolated epitaxial FePt L10 nanoparticles have been investigated for a wide range of particle diameters D. Careful analyses of the experiments have revealed that for particles larger than 20 nm the magnetization reversal behaviors are governed by either nucleation or expansion of a reversed domain depending on the temperature, and the coherent rotation mode becomes dominant for D<20 nm.",

keywords = "Magnetic thin films, Magnetic recording, Magnetic anisotropy, IR-77407, Iron alloys, Platinum-group",

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AU - Okamoto, S.

AU - Kikuchi, Nobuaki

AU - Kitakami, O.

AU - Shimada, Y.

PY - 2005

Y1 - 2005

N2 - We have studied the magnetization reversals of FePt L10 particles. Lithographically fabricated single FePt particles and well isolated epitaxial FePt L10 nanoparticles have been investigated for a wide range of particle diameters D. Careful analyses of the experiments have revealed that for particles larger than 20 nm the magnetization reversal behaviors are governed by either nucleation or expansion of a reversed domain depending on the temperature, and the coherent rotation mode becomes dominant for D<20 nm.

AB - We have studied the magnetization reversals of FePt L10 particles. Lithographically fabricated single FePt particles and well isolated epitaxial FePt L10 nanoparticles have been investigated for a wide range of particle diameters D. Careful analyses of the experiments have revealed that for particles larger than 20 nm the magnetization reversal behaviors are governed by either nucleation or expansion of a reversed domain depending on the temperature, and the coherent rotation mode becomes dominant for D<20 nm.

KW - Magnetic thin films

KW - Magnetic recording

KW - Magnetic anisotropy

KW - IR-77407

KW - Iron alloys

KW - Platinum-group

U2 - 10.1016/j.scriptamat.2005.04.034

DO - 10.1016/j.scriptamat.2005.04.034

M3 - Article

VL - 53

SP - 395

EP - 401

JO - Journal of magnetism and magnetic materials

JF - Journal of magnetism and magnetic materials

SN - 0304-8853

IS - 4

ER -