Ferromagnetic Properties of Ultra Fine Metal Particles.
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- Hiratsuka Nobuyuki
- Dept. of Functional Materials Science, Faculty of Engineering, Saitama University
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- Tomimori Hiroaki
- Dept. of Functional Materials Science, Faculty of Engineering, Saitama University
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- Minakawa Takahiro
- Dept. of Functional Materials Science, Faculty of Engineering, Saitama University
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- Kakizaki Koichi
- Dept. of Functional Materials Science, Faculty of Engineering, Saitama University
Bibliographic Information
- Other Title
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- 磁性材料の化学 I 強磁性金属超微粒子の磁気的性質
- キョウジセイ キンゾク チョウ ビリュウシ ノ ジキテキ セイシツ
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Abstract
Ferromagnetic ultra metallic fine particles of Fe, Ni and Co were prepared by a gas evaporation method in the pressure of nitrogen gas from 0.5-4Torr. Fine structures of these particles were revealed by a transmission electron microscope and a scanning electron microscope (SEM). Magnetic properties of the particles were measured by a vibrating sample magnetometer. The Fe, Ni and Co ultra fine particles observed by SEM were regarded as spheres and their surfaces were composed of oxide layers Fe3O4, NiO and CoO, respectively. The maximum coercivity was 1320, 1160 and 290Oe, respectively, for Co (425Å), Fe (310Å) and Ni (415Å) at room temperature. The exchange magnetic anisotropy between the cobalt core and the cobalt oxide shell was observed when the Co ultra fine particles were cooled in an applied field of 7kOe from room temperature to 77K.
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 43 (12), 1411-1414, 1996
Japan Society of Powder and Powder Metallurgy
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Details 詳細情報について
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- CRID
- 1390001206309062656
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- NII Article ID
- 10002261157
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- NII Book ID
- AN00222724
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- COI
- 1:CAS:528:DyaK2sXnsVShsw%3D%3D
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- ISSN
- 18809014
- 05328799
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- NDL BIB ID
- 4118675
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed