The fabrication and characterization of spintronic terahertz emitter using magnetic/non-magnetic bilayer with nanometer thickness

Nishitani, Mikihiko; Ejiri, Kohei; Isosaki, Shinya; Dai, Ruochen; Nishitani, Shojiro; Nakajima, Makoto

doi:https://doi.org/10.1557/s43580-024-00925-x

The fabrication and characterization of spintronic terahertz emitter using magnetic/non-magnetic bilayer with nanometer thickness

Nishitani, Mikihiko; Ejiri, Kohei; Isosaki, Shinya et al.

MRS Advances, 2024, 9, 1358-1363

アクセス数:14件（2026-09-20 05:42 集計）

固定URL: https://hdl.handle.net/11094/106460

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タイトル	The fabrication and characterization of spintronic terahertz emitter using magnetic/non-magnetic bilayer with nanometer thickness
著者	NRID 1000070712842 1000070712842 ORCID 0000-0002-6322-7486 0000-0002-6322-7486 researchmap permalink Mn_3550798-5896 Mn_3550798-5896 Scopus Author ID 7006076006 7006076006 著者名 Nishitani, Mikihiko
	著者名 Ejiri, Kohei
	著者名 Isosaki, Shinya
	著者名 Dai, Ruochen
	著者名 Nishitani, Shojiro
	NRID 1000040361662 1000040361662 ORCID 0000-0002-0351-2197 0000-0002-0351-2197 researchmap permalink nakajimamakoto nakajimamakoto Scopus Author ID 55236697600 55236697600 著者名 Nakajima, Makoto
内容	Nishitani M., Ejiri K., Isosaki S., et al. The fabrication and characterization of spintronic terahertz emitter using magnetic/non-magnetic bilayer with nanometer thickness. MRS Advances 9, 1358–1363 (2024).
抄録	Recent innovations in spintronics have introduced a new approach to THz wave generation by exploiting ultrafast spin dynamics within magnetic/nonmagnetic heterostructures. This approach is promising as a compact and efficient terahertz wave source based on rapid advances in magnetic material fabrication and ultrafast laser technology. In this paper, nano-order controlled magnetic (Fe)/non-magnetic (Pt) bilayers are fabricated on glass substrates using magnetron sputtering, a cost-effective method for large area deposition. The thin films are characterized and their thickness dependence on spintronic terahertz emission performance is investigated. The magnetic films obtained in this study are characterized by XPS and identified as Fe₃O₄ rather than Fe metal; the Fe₃O₄ films function as the magnetic layers in STE devices and show good and stable performance over a wide range of film thickness (5–10 nm) compared to that of Fe metal films (1.5–2.5 nm). To analyze the performance, a one-dimensional model is constructed, and the analytical results are discussed.
出版者	Springer Nature
収録物名	MRS Advances
巻(号)	9
ページ	1358-1363
刊行年月	2024-08-26
言語	英語
ハンドルURL	https://hdl.handle.net/11094/106460
eISSN	20598521
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1557/s43580-024-00925-x
アクセス権	open access
権利情報	This article has been published in a revised form in MRS Advances https://doi.org/10.1557/s43580-024-00925-x. This version is free to view and download for private research and study only. Not for re-distribution or re-use. © copyright holder.
出版タイプ	Accepted Manuscript
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	MRS Advances. 2024, 9, p. 1358-1363
DC.title	The fabrication and characterization of spintronic terahertz emitter using magnetic/non-magnetic bilayer with nanometer thickness
DC.creator	Nishitani, Mikihiko
	Ejiri, Kohei
	Isosaki, Shinya
	Dai, Ruochen
	Nishitani, Shojiro
	Nakajima, Makoto
DC.publisher	Springer Nature
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-08-26
DC.identifier	https://doi.org/10.1557/s43580-024-00925-x
DC.description	Nishitani M., Ejiri K., Isosaki S., et al. The fabrication and characterization of spintronic terahertz emitter using magnetic/non-magnetic bilayer with nanometer thickness. MRS Advances 9, 1358–1363 (2024).
DCTERMS.abstract	Recent innovations in spintronics have introduced a new approach to THz wave generation by exploiting ultrafast spin dynamics within magnetic/nonmagnetic heterostructures. This approach is promising as a compact and efficient terahertz wave source based on rapid advances in magnetic material fabrication and ultrafast laser technology. In this paper, nano-order controlled magnetic (Fe)/non-magnetic (Pt) bilayers are fabricated on glass substrates using magnetron sputtering, a cost-effective method for large area deposition. The thin films are characterized and their thickness dependence on spintronic terahertz emission performance is investigated. The magnetic films obtained in this study are characterized by XPS and identified as Fe₃O₄ rather than Fe metal; the Fe₃O₄ films function as the magnetic layers in STE devices and show good and stable performance over a wide range of film thickness (5–10 nm) compared to that of Fe metal films (1.5–2.5 nm). To analyze the performance, a one-dimensional model is constructed, and the analytical results are discussed.
DC.rights	This article has been published in a revised form in MRS Advances https://doi.org/10.1557/s43580-024-00925-x. This version is free to view and download for private research and study only. Not for re-distribution or re-use. © copyright holder.
DC.format	106460
citation_title	The fabrication and characterization of spintronic terahertz emitter using magnetic/non-magnetic bilayer with nanometer thickness
citation_author	Nishitani, Mikihiko
	Ejiri, Kohei
	Isosaki, Shinya
	Dai, Ruochen
	Nishitani, Shojiro
	Nakajima, Makoto
citation_publisher	Springer Nature
citation_language	英語
citation_date	2024-08-26
citation_journal_title	MRS Advances
citation_volume	9
citation_firstpage	1358
citation_lastpage	1363
citation_doi	https://doi.org/10.1557/s43580-024-00925-x
citation_public_url	https://hdl.handle.net/11094/106460

The fabrication and characterization of spintronic terahertz emitter using magnetic/non-magnetic bilayer with nanometer thickness

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