Atomic Structure Imaging of Ferromagnetic Long-Range Ordered Alloy Nanoparticles
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- Sato Kazuhisa
- 東北大学金属材料研究所
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- J. Konno Toyohiko
- 東北大学金属材料研究所
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- Hirotsu Yoshihiko
- 大阪大学産業科学研究所
Bibliographic Information
- Other Title
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- 強磁性規則合金ナノ粒子の原子的構造
- キョウジセイ キソク ゴウキン ナノ リュウシ ノ ゲンシテキ コウゾウ
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Abstract
<p>We have studied the atomic ordering and structures of hard magnetic L10–type FePd and CoPt alloy nanoparticles using aberration-corrected high-resolution transmission electron microscopy (HRTEM). The key issue throughout this study is the atomic ordering in the alloy nanoparticles; in view of excellent hard magnetic properties due to the high magnetocrystalline anisotropy energy, which is dependent on the long-range order parameter. The kinetics of atomic ordering plays a crucial role here, i.e., annealing below a reduced order-disorder transformation temperature is essential in obtaining the L10 ordered phase in small nanoparticles. Imaging using aberration-corrected HRTEM unambiguously revealed the atomic structures of the alloy nanoparticles 2−10 nm in diameter. The technique developed rapidly in the past ten years and is now practically available for the structural analysis in materials science.</p>
Journal
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- KENBIKYO
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KENBIKYO 47 (3), 167-171, 2012-09-30
The Japanese Society of Microscopy
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Keywords
Details 詳細情報について
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- CRID
- 1390565134806663424
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- NII Article ID
- 10031121402
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- NII Book ID
- AA11917781
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- ISSN
- 24342386
- 13490958
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- NDL BIB ID
- 024037975
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed