Annealing effect on acoustic property of Fe/Pt superlattice studied by picosecond ultrasound

Nakamura, Nobutomo; Uranishi, Atsuyoshi; Wakita, Mamoru; Ogi, Hirotsugu; Hirao, Masahiko

doi:https://doi.org/10.1143/JJAP.49.07HB04

Annealing effect on acoustic property of Fe/Pt superlattice studied by picosecond ultrasound

Nakamura, Nobutomo; Uranishi, Atsuyoshi; Wakita, Mamoru et al.

Japanese Journal of Applied Physics, 2010, 49, 07HB04

Number of Access:414（2025-10-09 11:48 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84481

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Title	Annealing effect on acoustic property of Fe/Pt superlattice studied by picosecond ultrasound
Creator	NRID 1000050452404 1000050452404 researchmap permalink nnakamura nnakamura Scopus Author ID 7403356186 7403356186 ORCID 0000-0002-5338-842X 0000-0002-5338-842X CreatorName Nakamura, Nobutomo
	CreatorName Uranishi, Atsuyoshi
	CreatorName Wakita, Mamoru
	NRID 1000090252626 1000090252626 researchmap permalink read0042771 read0042771 Scopus Author ID 35563683500 35563683500 CreatorName Ogi, Hirotsugu
	NRID 1000080112027 1000080112027 CreatorName Hirao, Masahiko
Description	Nobutomo Nakamura, Atsuyoshi Uranishi, Mamoru Wakita, Hirotsugu Ogi and Masahiko Hirao. Annealing effect on acoustic property of Fe/Pt superlattice studied by picosecond ultrasound. Japanese Journal of Applied Physics, 2010, 49(7S), 07HB04. https://doi.org/10.1143/JJAP.49.07HB04.
Abstract	Fe/Pt superlattices deposited on glass substrates were annealed after deposition, and the relationships among annealing temperature, out-of-plane longitudinal-wave elastic constant, and the attenuation of a GHz longitudinal acoustic pulse propagating in the superlattices were studied using picosecond ultrasound. Picosecond ultrasound generates and detects GHz longitudinal acoustic pulses using ultrashort pulse lights, and is capable of evaluating the acoustic property of a superlattice thinner than 100 nm without touching the specimen. The elastic constant of an asdeposited superlattice was smaller than those of bulk Fe and Pt; it increased as annealing temperature increased. The attenuation also increased as annealing temperature increased. The frequency dependence of the attenuation indicated the formation of FePt alloy at interfaces at 300 °C. Thus, we confirmed that the investigation of acoustic properties using picosecond ultrasound can be a powerful tool for evaluating the structural evolution in superlattices.
Publisher	The Japan Society of Applied Physics
Source Title	Japanese Journal of Applied Physics
Volume (Issue)	49
Page	07HB04
Date of Issued	2010-07-20
Language	English
Handle URL	https://hdl.handle.net/11094/84481
PISSN	00214922
eISSN	13474065
NCID	AA12295836
Relation.isVersionOf	DOI (Publisher Version) https://doi.org/10.1143/JJAP.49.07HB04
Access Rights	open access
oaire:version	Accepted Manuscript
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Japanese Journal of Applied Physics. 2010, 49, p. 07HB04
DC.title	Annealing effect on acoustic property of Fe/Pt superlattice studied by picosecond ultrasound
DC.creator	Nakamura, Nobutomo
	Uranishi, Atsuyoshi
	Wakita, Mamoru
	Ogi, Hirotsugu
	Hirao, Masahiko
DC.publisher	The Japan Society of Applied Physics
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2010-07-20
DC.identifier	https://doi.org/10.1143/JJAP.49.07HB04
DC.description	Nobutomo Nakamura, Atsuyoshi Uranishi, Mamoru Wakita, Hirotsugu Ogi and Masahiko Hirao. Annealing effect on acoustic property of Fe/Pt superlattice studied by picosecond ultrasound. Japanese Journal of Applied Physics, 2010, 49(7S), 07HB04. https://doi.org/10.1143/JJAP.49.07HB04.
DCTERMS.abstract	Fe/Pt superlattices deposited on glass substrates were annealed after deposition, and the relationships among annealing temperature, out-of-plane longitudinal-wave elastic constant, and the attenuation of a GHz longitudinal acoustic pulse propagating in the superlattices were studied using picosecond ultrasound. Picosecond ultrasound generates and detects GHz longitudinal acoustic pulses using ultrashort pulse lights, and is capable of evaluating the acoustic property of a superlattice thinner than 100 nm without touching the specimen. The elastic constant of an asdeposited superlattice was smaller than those of bulk Fe and Pt; it increased as annealing temperature increased. The attenuation also increased as annealing temperature increased. The frequency dependence of the attenuation indicated the formation of FePt alloy at interfaces at 300 °C. Thus, we confirmed that the investigation of acoustic properties using picosecond ultrasound can be a powerful tool for evaluating the structural evolution in superlattices.
DC.format	84481
citation_title	Annealing effect on acoustic property of Fe/Pt superlattice studied by picosecond ultrasound
citation_author	Nakamura, Nobutomo
	Uranishi, Atsuyoshi
	Wakita, Mamoru
	Ogi, Hirotsugu
	Hirao, Masahiko
citation_publisher	The Japan Society of Applied Physics
citation_language	English
citation_date	2010-07-20
citation_journal_title	Japanese Journal of Applied Physics
citation_volume	49
citation_firstpage	07HB04
citation_doi	https://doi.org/10.1143/JJAP.49.07HB04
citation_public_url	https://hdl.handle.net/11094/84481

Annealing effect on acoustic property of Fe/Pt superlattice studied by picosecond ultrasound

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