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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Supercritical Hydrothermal Synthesis of Spinel-Type Nonstoichiometric Cobalt Gallate Nanoparticles and Their Magnetic Properties

http://hdl.handle.net/2237/0002007331
http://hdl.handle.net/2237/0002007331
4aa6f5ba-2824-42e2-ab82-a07ba21b6692
名前 / ファイル ライセンス アクション
2023-02-28Crystal_GrowthandDesign_Manuscript 2023-02-28Crystal_GrowthandDesign_Manuscript File_ Manuscript_ID_cg-2022-01435r.pdf (9.2 MB)
 Download is available from 2024/4/4.
Item type itemtype_ver1(1)
公開日 2023-09-14
タイトル
タイトル Supercritical Hydrothermal Synthesis of Spinel-Type Nonstoichiometric Cobalt Gallate Nanoparticles and Their Magnetic Properties
言語 en
著者 Xie, Bo

× Xie, Bo

en Xie, Bo

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Numako, Chiya

× Numako, Chiya

en Numako, Chiya

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Naka, Takashi

× Naka, Takashi

en Naka, Takashi

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Takami, Seiichi

× Takami, Seiichi

en Takami, Seiichi

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アクセス権
アクセス権 embargoed access
アクセス権URI http://purl.org/coar/access_right/c_f1cf
権利
言語 en
権利情報 This document is the Accepted Manuscript version of a Published Work that appeared in final form in [Crystal Growth & Design], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [https://pubs.acs.org/articlesonrequest/AOR-KWQERUGMSSFVVKJZQZEW].”
内容記述
内容記述 Spinel-type metal oxide nanoparticles are known to exhibit various properties, which can be further enhanced by the synthesis of nonstoichiometric nanoparticles. In this work, we report the production of nonstoichiometric cobalt gallate nanoparticles (Co–Ga NPs) with larger inversion parameters that resulted in enhanced magnetic properties compared to previous studies. The synthesis of nonstoichiometric nanoparticles was realized by a supercritical hydrothermal process and without performing calcination at a high temperature which tended to synthesize thermodynamically stable stoichiometric products. We synthesized nonstoichiometric Co–Ga NPs with a controllable Co/Ga molar ratio, morphology, and particle size at different pH values of the precursor solutions. By applying X-ray absorption fine structure analysis at Ga K-edge, Co K-edge, and Rietveld refinement, nonstoichiometric Co–Ga NPs were found to have large numbers of cobalt atoms occupying octahedral sites compared to CoGa2O4. Their superparamagnetic behavior with enhanced spontaneous magnetization at room temperature owing to percolated superexchange interaction of JBB was observed for the first time. We also proposed a possible formation mechanism of nonstoichiometric Co–Ga NPs from cobalt gallium nitrate layered double hydroxides in the precursor solutions.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 ACS Publications
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
関連情報
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1021/acs.cgd.2c01435
収録物識別子
収録物識別子タイプ PISSN
収録物識別子 1528-7483
書誌情報 en : Crystal Growth & Design

巻 23, 号 4, p. 2511-2521, 発行日 2023-04-05
ファイル公開日
日付 2024-04-05
日付タイプ Available
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