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  1. 060 工学部
  2. 0601 学術論文

Magnetic and electronic properties of bimagnetic materials comprising cobalt particles within hollow silica decorated with magnetite nanoparticles

http://hdl.handle.net/10091/17711
0841bc86-fca3-473a-b79a-29e3e1013bbc
名前 / ファイル ライセンス アクション
Magnetic_electronic_properties_bimagnetic_materials.pdf Magnetic_electronic_properties_bimagnetic_materials.pdf (2.2 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2014-07-09
タイトル
言語 en
タイトル Magnetic and electronic properties of bimagnetic materials comprising cobalt particles within hollow silica decorated with magnetite nanoparticles
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Okada, T

× Okada, T

WEKO 37429

Okada, T

Search repository
Gonzalez-Alfaro, Y

× Gonzalez-Alfaro, Y

WEKO 37430

Gonzalez-Alfaro, Y

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Espinosa, A

× Espinosa, A

WEKO 37431

Espinosa, A

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Watanabe, N

× Watanabe, N

WEKO 37432

Watanabe, N

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Haeiwa, T

× Haeiwa, T

WEKO 37433

Haeiwa, T

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Sonehara, M

× Sonehara, M

WEKO 37434

Sonehara, M

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Mishima, S

× Mishima, S

WEKO 37435

Mishima, S

Search repository
Sato, T

× Sato, T

WEKO 37436

Sato, T

Search repository
Munoz-Noval, A

× Munoz-Noval, A

WEKO 37437

Munoz-Noval, A

Search repository
Aranda, P

× Aranda, P

WEKO 37438

Aranda, P

Search repository
Garcia-Hernandez, M

× Garcia-Hernandez, M

WEKO 37439

Garcia-Hernandez, M

Search repository
Ruiz-Hitzky, E

× Ruiz-Hitzky, E

WEKO 37440

Ruiz-Hitzky, E

Search repository
信州大学研究者総覧へのリンク
氏名 Okada, T
URL http://soar-rd.shinshu-u.ac.jp/profile/ja.WpDFbpkh.html
信州大学研究者総覧へのリンク
氏名 Haeiwa, T
URL http://soar-rd.shinshu-u.ac.jp/profile/ja.ZNkeZVkh.html
信州大学研究者総覧へのリンク
氏名 Sonehara, M
URL http://soar-rd.shinshu-u.ac.jp/profile/ja.WhfCbpkh.html
信州大学研究者総覧へのリンク
氏名 Sato, T
URL http://soar-rd.shinshu-u.ac.jp/profile/ja.yNSNbpkh.html
出版者
出版者 AMER INST PHYSICS
引用
内容記述タイプ Other
内容記述 JOURNAL OF APPLIED PHYSICS. 114(12):124304 (2013)
書誌情報 JOURNAL OF APPLIED PHYSICS

巻 114, 号 12, p. 124304, 発行日 2013-09-28
抄録
内容記述タイプ Abstract
内容記述 Bimagnetic materials were fabricated by decorating the external surface of rattle-type hollow silica microspheres (which themselves contain metallic cobalt nanoparticles) with magnetite nanoparticles; thus, each magnetic substance was spatially isolated by the silica shell. The amount of magnetite decoration on the co-occluded hollow silica was varied from 1 to 17 mass %. Magnetic and electronic properties of the resulting bimagnetic materials were characterized by superconducting quantum interference device measurements and X-ray absorption spectroscopy, respectively. The ferrous iron in the bimagnetic sample was slightly more oxidized than in the magnetite reference, probably from some charge-transfer because of the SiO2 surface contact, although the overall oxidation state of the samples is very similar to that of magnetite. The temperature dependence of the sample magnetization recorded with Zero Field Cooling and Field Cooling resulted in blocking temperatures for the bimagnetic materials that were close to that of magnetite nanoparticles (176K) and were lower than that for the bare Co-occluded hollow silica (which was above room temperature). Values of coercive force and exchange bias at 300K became quite small after decoration with only minimal amounts of magnetite nanoparticles (1-3 mass %) and were lower than those of magnetite. This is the first example of enhancing superparamagnetism by spatial separation of both Co and magnetite magnetic nanoparticles using a thin wall of diamagnetic silica.
資源タイプ(コンテンツの種類)
内容記述タイプ Other
内容記述 Article
ISSN
収録物識別子タイプ ISSN
収録物識別子 0021-8979
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA00693547
DOI
関連識別子
識別子タイプ DOI
関連識別子 https://doi.org/10.1063/1.4822299
関連名称
関連名称 10.1063/1.4822299
権利
権利情報 Copyright© 2013 AIP Publishing LLC.
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
WoS
表示名 Web of Science
URL http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000325391100054
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