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Tuning the onset of ferromagnetism in heterogeneous bimetallic nanoparticles by gas phase doping
https://oist.repo.nii.ac.jp/records/338
https://oist.repo.nii.ac.jp/records/33877829179-7d9c-4de8-ade1-98aa009166bc
名前 / ファイル | ライセンス | アクション |
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PhysRevMaterials.1.066001 (3.7 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-03-16 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Tuning the onset of ferromagnetism in heterogeneous bimetallic nanoparticles by gas phase doping | |||||
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× Grammatikopoulos, Panagiotis× Singh, Vidyadhar× Zhao, Junlei× Toulkeridou, Evropi× Steinhauer, Stephan× Kioseoglou, Joseph× Bobo, Jean-François× Nordlund, Kai× Djurabekova, Flyura× Sowwan, Mukhles |
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書誌情報 |
en : Physical Review Materials 巻 1, 号 6, p. 066001, 発行日 2017-11-09 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | In the nanoregime, chemical species can reorganize in ways not predicted by their equilibrium bulk behavior. Here, we engineer Ni-Cr nanoalloys at the magnetic end of their compositional range (i.e., 0–15 at. % Cr), and we investigate the effect of Cr incorporation on their structural stability and resultant magnetic ordering. To ensure their stoichiometric compositions, the nanoalloys are grown by cluster beam deposition, a method that allows one-step, chemical-free fabrication of bimetallic nanoparticles. While full Cr segregation toward nanoparticle surfaces is thermodynamically expected for low Cr concentrations, metastability occurs as the Cr dopant level increases in the form of residual Cr in the core region, yielding desirable magnetic properties in a compensatory manner. Using nudged elastic band calculations, residual Cr in the core is explained based on modifications in the local environment of individual Cr atoms. The resultant competition between ferromagnetic and antiferromagnetic ordering gives rise to a wide assortment of interesting phenomena, such as a cluster-glass ground state at very low temperatures and an increase in Curie temperature values. We emphasize the importance of obtaining the commonly elusive magnetic nanophase diagram for M-Cr (M=Fe, Co, and Ni) nanoalloys, and we propose an efficient single-parameter method of tuning the Curie temperature for various technological applications. | |||||
出版者 | ||||||
出版者 | American Physical Society | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2475-9953 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1103/PhysRevMaterials.1.066001 | |||||
権利 | ||||||
権利情報 | ©2017 American Physical Society | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.1.066001 | |||||
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 |