Long-Range Order Parameter of Oriented L1₀-FePt Nanoparticles Determined by Electron Diffraction

Sato, Kazuhisa; Hirotsu, Yoshihiko

doi:https://doi.org/10.2320/matertrans.44.1518

Long-Range Order Parameter of Oriented L1₀-FePt Nanoparticles Determined by Electron Diffraction

Sato, Kazuhisa; Hirotsu, Yoshihiko

Materials Transactions, 2003, 44(8), 1518-1522

アクセス数:271件（2025-08-14 22:13 集計）

固定URL: https://hdl.handle.net/11094/89446

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タイトル	Long-Range Order Parameter of Oriented L1₀-FePt Nanoparticles Determined by Electron Diffraction
著者	NRID 1000070314424 1000070314424 ORCID 0000-0001-9078-2541 0000-0001-9078-2541 researchmap permalink read0158304 read0158304 Scopus Author ID 55552977400 55552977400 著者名 Sato, Kazuhisa
著者	NRID 1000070016525 1000070016525 著者名 Hirotsu, Yoshihiko
キーワード等	Dynamical scattering
	Electron diffraction
	FePt
	Hh0 systematic reflection
	Multi-slice simulation
	Nanoparticle
	Order parameter
抄録	Two-dimensionally dispersed L10-FePt nanoparticles as small as 12 nm with orientation was fabricated by electron-beam evaporation and post-annealing at 873 K. After a prolonged annealing at 873 K for 86.4 ks, the increase of coercivity was almost saturated and coercivity reached 434 kAm -1 at 300 K, which is very small compared to recent reports on FePt nanoparticles with sizes larger than 20 nm. Long-range order parameter of the fabricated nanoparticles was determined by electron diffraction at 200 kV taking the multiple scattering into consideration. Obtained order parameter remained 0.55 ± 0.02 for the nanoparticles with an axial ratio c/a of 0.961 ± 0.003. The low degree of order is thought to be responsible for the small coercivity. Effect of Debye-Waller factor on the order parameter was discussed.
出版者	The Japan Institute of Metals and Materials
収録物名	Materials Transactions
巻(号)	44(8)
ページ	1518-1522
刊行年月	2003
言語	英語
ハンドルURL	https://hdl.handle.net/11094/89446
PISSN	13459678
eISSN	13475320
NCID	AA1151294X
NCID	AA12041816
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.2320/matertrans.44.1518
アクセス権	open access
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Materials Transactions. 2003, 44(8), p. 1518-1522
DC.title	Long-Range Order Parameter of Oriented L1₀-FePt Nanoparticles Determined by Electron Diffraction
DC.creator	Sato, Kazuhisa
DC.creator	Hirotsu, Yoshihiko
DC.publisher	The Japan Institute of Metals and Materials
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2003
DC.identifier	https://doi.org/10.2320/matertrans.44.1518
DC.subject	Dynamical scattering
	Electron diffraction
	FePt
	Hh0 systematic reflection
	Multi-slice simulation
	Nanoparticle
	Order parameter
DCTERMS.abstract	Two-dimensionally dispersed L10-FePt nanoparticles as small as 12 nm with orientation was fabricated by electron-beam evaporation and post-annealing at 873 K. After a prolonged annealing at 873 K for 86.4 ks, the increase of coercivity was almost saturated and coercivity reached 434 kAm -1 at 300 K, which is very small compared to recent reports on FePt nanoparticles with sizes larger than 20 nm. Long-range order parameter of the fabricated nanoparticles was determined by electron diffraction at 200 kV taking the multiple scattering into consideration. Obtained order parameter remained 0.55 ± 0.02 for the nanoparticles with an axial ratio c/a of 0.961 ± 0.003. The low degree of order is thought to be responsible for the small coercivity. Effect of Debye-Waller factor on the order parameter was discussed.
DC.format	89446
citation_title	Long-Range Order Parameter of Oriented L1₀-FePt Nanoparticles Determined by Electron Diffraction
citation_author	Sato, Kazuhisa
citation_author	Hirotsu, Yoshihiko
citation_publisher	The Japan Institute of Metals and Materials
citation_language	英語
citation_date	2003
citation_journal_title	Materials Transactions
citation_volume	44
citation_issue	8
citation_firstpage	1518
citation_lastpage	1522
citation_doi	https://doi.org/10.2320/matertrans.44.1518
citation_public_url	https://hdl.handle.net/11094/89446

Long-Range Order Parameter of Oriented L1₀-FePt Nanoparticles Determined by Electron Diffraction

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