Direct measurement of magnetocaloric effect (MCE) in frustrated Gd-based molecular complexes

Zhang, Yu; Nomoto, Tetsuya; Yamashita, Satoshi; Akutsu, Hiroki; Yoshinari, Nobuto; Konno, Takumi; Nakazawa, Yasuhiro

doi:https://doi.org/10.1007/s10973-024-13344-9

Direct measurement of magnetocaloric effect (MCE) in frustrated Gd-based molecular complexes

Zhang, Yu; Nomoto, Tetsuya; Yamashita, Satoshi et al.

Journal of Thermal Analysis and Calorimetry, 2024

アクセス数:31件（2025-04-21 11:10 集計）

固定URL: https://hdl.handle.net/11094/98269

閲覧可能ファイル

ファイル	フォーマット	利用条件	サイズ	閲覧回数	利用開始日	説明	information
JThermAnalCalor_s10973-024-13344-9	pdf	なし	1.53 MB	45	2024.10.15

Creative Commons : 表示

論文情報

ファイル出力 EndNote Basic出力 Mendeley出力

タイトル	Direct measurement of magnetocaloric effect (MCE) in frustrated Gd-based molecular complexes
著者	著者名 Zhang, Yu
	NRID 1000000908650 1000000908650 著者名 Nomoto, Tetsuya
	NRID 1000040587466 1000040587466 researchmap permalink sayamash sayamash Scopus Author ID 55210349200 55210349200 著者名 Yamashita, Satoshi
	NRID 1000080316033 1000080316033 researchmap permalink read0054913 read0054913 Scopus Author ID 7102483241 7102483241 著者名 Akutsu, Hiroki
	NRID 1000010583338 1000010583338 ORCID 0000-0003-2457-0967 0000-0003-2457-0967 researchmap permalink read0151149 read0151149 Scopus Author ID 14009212400 14009212400 著者名 Yoshinari, Nobuto
	NRID 1000050201497 1000050201497 researchmap permalink takumikonno takumikonno Scopus Author ID 7202325347 7202325347 著者名 Konno, Takumi
	NRID 1000060222163 1000060222163 researchmap permalink thermo102 thermo102 Scopus Author ID 55556980600 55556980600 著者名 Nakazawa, Yasuhiro
キーワード等	Cubane
	Frustrated
	Gadolinium
	Magnetocaloric effect
	Molecular refrigerant
内容	The version of record of this article, first published in Journal of Thermal Analysis and Calorimetry, is available online at Publisher’s website: https://doi.org/10.1007/s10973-024-13344-9.
抄録	Generation of low temperatures below 1 K has been required for applications and fundamental research, given this, development of new materials utilized for demagnetization cooling has extensively been performed in recent years. Here, we studied two polynuclear Gd3+-based molecular compounds of Gd0.33[Gd4(OH)4(OAc)3][Rh4Zn4(L-cys)12]·32H2O (1Gd) and Gd0.33[Gd4(OH)4(OAc)3][Ir4Zn4(L-cys)12]·28H2O (2Gd) (L-cys = L-cysteinate) which show paramagnetic even at low temperatures due to their frustrated arrangement of Gd3+ ions. We discuss the magnitude of the magnetocaloric effect (MCE) in them inferred from the isothermal magnetic entropy change (ΔSM) from isothermal magnetization data. The − ΔSMmax of 1Gd and 2Gd are 15.15 J kg−1 K−1 and 17.49 J kg−1 K−1 occur at 2.0 K under an applied field from 0 to 7 T, respectively. We also discussed the results of heat capacity measurement under magnetic fields to confirm the validity of the entropy change for 1Gd. Furthermore, with an aim of detecting their MCE directly, we have developed a new non-magnetic and metal-free magnetocaloric measurement cell. The adiabatic temperature change (ΔTad) occurs in a small amount of sample on an order of 102-microgram with the application and removal of various magnitude magnetic fields starting from several initial temperatures were detected directly, to evaluate the potential of them to be a refrigerant for an adiabatic demagnetization refrigerator. The instrumental design for direct measurements of MCE is described along with the construction details.
出版者	Springer Science and Business Media B.V.
収録物名	Journal of Thermal Analysis and Calorimetry
刊行年月	2024-07-31
言語	英語
ハンドルURL	https://hdl.handle.net/11094/98269
PISSN	13886150
eISSN	15882926
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1007/s10973-024-13344-9
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution 4.0 International License.
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
DCTERMS.bibliographicCitation	Journal of Thermal Analysis and Calorimetry. 2024
DC.title	Direct measurement of magnetocaloric effect (MCE) in frustrated Gd-based molecular complexes
DC.creator	Zhang, Yu
	Nomoto, Tetsuya
	Yamashita, Satoshi
	Akutsu, Hiroki
	Yoshinari, Nobuto
	Konno, Takumi
	Nakazawa, Yasuhiro
DC.publisher	Springer Science and Business Media B.V.
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-07-31
DC.identifier	https://doi.org/10.1007/s10973-024-13344-9
DC.subject	Cubane
	Frustrated
	Gadolinium
	Magnetocaloric effect
	Molecular refrigerant
DC.description	The version of record of this article, first published in Journal of Thermal Analysis and Calorimetry, is available online at Publisher’s website: https://doi.org/10.1007/s10973-024-13344-9.
DCTERMS.abstract	Generation of low temperatures below 1 K has been required for applications and fundamental research, given this, development of new materials utilized for demagnetization cooling has extensively been performed in recent years. Here, we studied two polynuclear Gd3+-based molecular compounds of Gd0.33[Gd4(OH)4(OAc)3][Rh4Zn4(L-cys)12]·32H2O (1Gd) and Gd0.33[Gd4(OH)4(OAc)3][Ir4Zn4(L-cys)12]·28H2O (2Gd) (L-cys = L-cysteinate) which show paramagnetic even at low temperatures due to their frustrated arrangement of Gd3+ ions. We discuss the magnitude of the magnetocaloric effect (MCE) in them inferred from the isothermal magnetic entropy change (ΔSM) from isothermal magnetization data. The − ΔSMmax of 1Gd and 2Gd are 15.15 J kg−1 K−1 and 17.49 J kg−1 K−1 occur at 2.0 K under an applied field from 0 to 7 T, respectively. We also discussed the results of heat capacity measurement under magnetic fields to confirm the validity of the entropy change for 1Gd. Furthermore, with an aim of detecting their MCE directly, we have developed a new non-magnetic and metal-free magnetocaloric measurement cell. The adiabatic temperature change (ΔTad) occurs in a small amount of sample on an order of 102-microgram with the application and removal of various magnitude magnetic fields starting from several initial temperatures were detected directly, to evaluate the potential of them to be a refrigerant for an adiabatic demagnetization refrigerator. The instrumental design for direct measurements of MCE is described along with the construction details.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	98269
citation_title	Direct measurement of magnetocaloric effect (MCE) in frustrated Gd-based molecular complexes
citation_author	Zhang, Yu
	Nomoto, Tetsuya
	Yamashita, Satoshi
	Akutsu, Hiroki
	Yoshinari, Nobuto
	Konno, Takumi
	Nakazawa, Yasuhiro
citation_publisher	Springer Science and Business Media B.V.
citation_language	英語
citation_date	2024-07-31
citation_journal_title	Journal of Thermal Analysis and Calorimetry
citation_doi	https://doi.org/10.1007/s10973-024-13344-9
citation_public_url	https://hdl.handle.net/11094/98269

Direct measurement of magnetocaloric effect (MCE) in frustrated Gd-based molecular complexes

閲覧可能ファイル

論文情報

論文詳細を表示