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Aggregation vs Surface Segregation: Antagonism over the Magnetic Behavior of NiCr Nanoparticles
https://oist.repo.nii.ac.jp/records/1939
https://oist.repo.nii.ac.jp/records/193934df198f-aeef-4cea-8066-a69f144a29b3
名前 / ファイル | ライセンス | アクション |
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Bohra-2020-Aggregation vs Surface Segregation_ (2.2 MB)
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ACS AuthorChoice (https://pubs.acs.org/page/policy/authorchoice_termsofuse.html)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-02-19 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Aggregation vs Surface Segregation: Antagonism over the Magnetic Behavior of NiCr Nanoparticles | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者(英) |
Bohra, Murtaza
× Bohra, Murtaza× Alman, Vidya× Showry, Arun× Singh, Vidyadhar× Diaz, Rosa E.× Sowwan, Mukhles× Grammatikopoulos, Panagiotis |
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書誌情報 |
en : ACS Omega 巻 5, 号 51, p. 32883-32889, 発行日 2020-12-14 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Annealing is a valuable method for fine-tuning the ultrasmall magnetic properties of alloy nanoparticles (NPs) by controlling their sizes, modifying their surfaces, and affecting their magnetic interactions. Herein, we study the effect of moderate annealing (450°C) on strongly interacting NiCr nanoparticle assemblies (0 <= atom % Cr ≤ 15) immediately after deposition. Concurrent temperature-dependent electron microscopy and magnetization data demonstrate the interplay of two competing factors, namely, enhanced particle aggregation and element-specific surface segregation, on the magnetic properties, with the former boosting and the latter suppressing them. Strong interparticle interactions can lead to a magnetic response different from that of superparamagnetic particles, namely, from canonical spin-glass (0 atom % Cr) to correlated spin-glass (5-15 atom % Cr) behavior below higher spin-glass transition temperatures T-g (20-350 K). The observation of "high-field susceptibility" below cryogenic temperatures (≤20 K) is ascribed to the presence of inhomogeneity/defects caused by Cr segregation. This work emphasizes the necessity of taking into account the delicate balance of such competing factors to understand the magnetic properties of nanoparticulate samples. | |||||
出版者 | ||||||
出版者 | American Chemical Society | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2470-1343 | |||||
PubMed番号 | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | PMID | |||||
関連識別子 | info:pmid/33403249 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1021/acsomega.0c03056 | |||||
権利 | ||||||
権利情報 | © 2020 American Chemical Society. | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://pubs.acs.org/doi/10.1021/acsomega.0c03056 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |