Oriented L10-FePt nanoparticles and their magnetic properties

K. Sato; B. Bian; T. Hanada; Y. Hirotsu

doi:10.1016/S1359-6462(01)00914-9

Oriented L1₀-FePt nanoparticles and their magnetic properties

K. Sato, B. Bian, T. Hanada, Y. Hirotsu

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

29 Citations (Scopus)

Abstract

The alloying reaction of Fe and Pt and the ordering reaction in nanometer-sized FePt particles was observed by in-situ TEM observation. At the initial stage of annealing, Fe started to dissolved into the Pt particles, then the ordering reaction started to occur simultaneously. These two reactions continued until all the Fe dissolved into the Pt during the annealing. The large magnetic coercivities as large as 815 kA/m were explained by the disappearance of the three-variants domains and the formation of crystallographic single domains.

Original language	English
Pages (from-to)	1389-1393
Number of pages	5
Journal	Scripta Materialia
Volume	44
Issue number	8-9
DOIs	https://doi.org/10.1016/S1359-6462(01)00914-9
Publication status	Published - 2001 May 18
Externally published	Yes

Keywords

Electron-beam deposition
Ferromagnetic hysteresis
Nanoparticles
Ordering
Transmission electron microscopy

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Access to Document

10.1016/S1359-6462(01)00914-9

Cite this

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title = "Oriented L10-FePt nanoparticles and their magnetic properties",

abstract = "The alloying reaction of Fe and Pt and the ordering reaction in nanometer-sized FePt particles was observed by in-situ TEM observation. At the initial stage of annealing, Fe started to dissolved into the Pt particles, then the ordering reaction started to occur simultaneously. These two reactions continued until all the Fe dissolved into the Pt during the annealing. The large magnetic coercivities as large as 815 kA/m were explained by the disappearance of the three-variants domains and the formation of crystallographic single domains.",

keywords = "Electron-beam deposition, Ferromagnetic hysteresis, Nanoparticles, Ordering, Transmission electron microscopy",

author = "K. Sato and B. Bian and T. Hanada and Y. Hirotsu",

note = "Funding Information: The authors wish to thank Prof. T. Kawai and Dr. H. Tanaka of ISIR, Osaka University for support of the SQUID measurement. This study was supported by the Center of Excellence (COE) program of the Japanese Ministry of Education, Science, Sports and Culture.",

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T1 - Oriented L10-FePt nanoparticles and their magnetic properties

AU - Sato, K.

AU - Bian, B.

AU - Hanada, T.

AU - Hirotsu, Y.

N1 - Funding Information: The authors wish to thank Prof. T. Kawai and Dr. H. Tanaka of ISIR, Osaka University for support of the SQUID measurement. This study was supported by the Center of Excellence (COE) program of the Japanese Ministry of Education, Science, Sports and Culture.

PY - 2001/5/18

Y1 - 2001/5/18

N2 - The alloying reaction of Fe and Pt and the ordering reaction in nanometer-sized FePt particles was observed by in-situ TEM observation. At the initial stage of annealing, Fe started to dissolved into the Pt particles, then the ordering reaction started to occur simultaneously. These two reactions continued until all the Fe dissolved into the Pt during the annealing. The large magnetic coercivities as large as 815 kA/m were explained by the disappearance of the three-variants domains and the formation of crystallographic single domains.

AB - The alloying reaction of Fe and Pt and the ordering reaction in nanometer-sized FePt particles was observed by in-situ TEM observation. At the initial stage of annealing, Fe started to dissolved into the Pt particles, then the ordering reaction started to occur simultaneously. These two reactions continued until all the Fe dissolved into the Pt during the annealing. The large magnetic coercivities as large as 815 kA/m were explained by the disappearance of the three-variants domains and the formation of crystallographic single domains.

KW - Electron-beam deposition

KW - Ferromagnetic hysteresis

KW - Nanoparticles

KW - Ordering

KW - Transmission electron microscopy

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