Determination of order parameter of L1₀ -FePd nanoparticles by electron diffraction

Sato, Kazuhisa; Hirotsu, Yoshihiko; Mori, Hirotaro; Wang, Zhouguang; Hirayama, Tsukasa

doi:https://doi.org/10.1063/1.1861987

Determination of order parameter of L1₀ -FePd nanoparticles by electron diffraction

Sato, Kazuhisa; Hirotsu, Yoshihiko; Mori, Hirotaro et al.

Journal of Applied Physics, 2005, 97(8), 084301

アクセス数:326件（2025-08-15 23:06 集計）

固定URL: https://hdl.handle.net/11094/89394

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タイトル	Determination of order parameter of L1₀ -FePd nanoparticles 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
	NRID 1000070016525 1000070016525 著者名 Hirotsu, Yoshihiko
	NRID 1000010024366 1000010024366 著者名 Mori, Hirotaro
	著者名 Wang, Zhouguang
	NRID 1000050399599 1000050399599 著者名 Hirayama, Tsukasa
内容	Kazuhisa Sato, Yoshihiko Hirotsu and Hirotaro Mori, "Determination of order parameter of L1₀–FePd nanoparticles by electron diffraction", Journal of Applied Physics 97, 084301 (2005) https://doi.org/10.1063/1.1861987
抄録	Long-range order (LRO) parameters of two-dimensional dispersed single-crystalline 10-nm -sized FePd nanoparticles with the L 10 structure have been determined accurately by electron diffraction in transmission electron microscopes (TEMs) under accelerating voltages of 300 kV and 1 kV. Diffraction patterns by exciting hh0 systematic reflections effectively reduced the numbers of diffracted beams and simplified the thickness dependence of intensity ratio I110 I220 for 110 and 220 reflections. Mean thickness of the nanoparticles was estimated to be 7.8 nm by electron holography. The relation between the intensity ratio and the order parameter was calculated on the basis of multiple-scattering intensity calculation. By comparing the relation and experimentally obtained intensity ratios, the order parameters of 0.65 and 0.79 were obtained using 300-kV TEM for FePd nanoparticles after annealing at 873 K for 3.6 and 36 ks, respectively. Also, the order parameter of 0.82 was obtained using 1-MV TEM for the same specimen annealed at 873 K for 36 ks. These order parameters were determined using the Debye-Waller factors for bulk Fe and Pd. The order parameter decreased about 7.3% when a very large Debye-Waller factor as large as 0.01 nm2 was assumed. A combination of electron diffraction under the conditions of hh0 systematic reflections and the diffraction experiment at the high accelerating voltage makes the LRO parameter analysis easy and correct. © 2005 American Institute of Physics.
出版者	American Institute of Physics
収録物名	Journal of Applied Physics
巻(号)	97(8)
ページ	084301
刊行年月	2005-04-15
言語	英語
ハンドルURL	https://hdl.handle.net/11094/89394
PISSN	00218979
NCID	AA00693547
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1063/1.1861987
アクセス権	open access
権利情報	This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Kazuhisa Sato, Yoshihiko Hirotsu and Hirotaro Mori, "Determination of order parameter of L1₀–FePd nanoparticles by electron diffraction", Journal of Applied Physics 97, 084301 (2005) and may be found at https://doi.org/10.1063/1.1861987.
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	Journal of Applied Physics. 2005, 97(8), p. 084301
DC.title	Determination of order parameter of L1₀ -FePd nanoparticles by electron diffraction
DC.creator	Sato, Kazuhisa
	Hirotsu, Yoshihiko
	Mori, Hirotaro
	Wang, Zhouguang
	Hirayama, Tsukasa
DC.publisher	American Institute of Physics
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2005-04-15
DC.identifier	https://doi.org/10.1063/1.1861987
DC.description	Kazuhisa Sato, Yoshihiko Hirotsu and Hirotaro Mori, "Determination of order parameter of L1₀–FePd nanoparticles by electron diffraction", Journal of Applied Physics 97, 084301 (2005) https://doi.org/10.1063/1.1861987
DCTERMS.abstract	Long-range order (LRO) parameters of two-dimensional dispersed single-crystalline 10-nm -sized FePd nanoparticles with the L 10 structure have been determined accurately by electron diffraction in transmission electron microscopes (TEMs) under accelerating voltages of 300 kV and 1 kV. Diffraction patterns by exciting hh0 systematic reflections effectively reduced the numbers of diffracted beams and simplified the thickness dependence of intensity ratio I110 I220 for 110 and 220 reflections. Mean thickness of the nanoparticles was estimated to be 7.8 nm by electron holography. The relation between the intensity ratio and the order parameter was calculated on the basis of multiple-scattering intensity calculation. By comparing the relation and experimentally obtained intensity ratios, the order parameters of 0.65 and 0.79 were obtained using 300-kV TEM for FePd nanoparticles after annealing at 873 K for 3.6 and 36 ks, respectively. Also, the order parameter of 0.82 was obtained using 1-MV TEM for the same specimen annealed at 873 K for 36 ks. These order parameters were determined using the Debye-Waller factors for bulk Fe and Pd. The order parameter decreased about 7.3% when a very large Debye-Waller factor as large as 0.01 nm2 was assumed. A combination of electron diffraction under the conditions of hh0 systematic reflections and the diffraction experiment at the high accelerating voltage makes the LRO parameter analysis easy and correct. © 2005 American Institute of Physics.
DC.rights	This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Kazuhisa Sato, Yoshihiko Hirotsu and Hirotaro Mori, "Determination of order parameter of L1₀–FePd nanoparticles by electron diffraction", Journal of Applied Physics 97, 084301 (2005) and may be found at https://doi.org/10.1063/1.1861987.
DC.format	89394
citation_title	Determination of order parameter of L1₀ -FePd nanoparticles by electron diffraction
citation_author	Sato, Kazuhisa
	Hirotsu, Yoshihiko
	Mori, Hirotaro
	Wang, Zhouguang
	Hirayama, Tsukasa
citation_publisher	American Institute of Physics
citation_language	英語
citation_date	2005-04-15
citation_journal_title	Journal of Applied Physics
citation_volume	97
citation_issue	8
citation_firstpage	084301
citation_doi	https://doi.org/10.1063/1.1861987
citation_public_url	https://hdl.handle.net/11094/89394

Determination of order parameter of L1₀ -FePd nanoparticles by electron diffraction

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