Electron microscopy studies on magnetic L1 0 -type FePd nanoparticles

Kazuhisa Sato, Toyohiko J. Konno, Yoshihiko Hirotsu

研究成果: Chapter

3 被引用数 (Scopus)

抄録

The results on atomic ordering and structures of hard magnetic L1 0 FePd nanoparticles studied by modern electron microscopy techniques, including NBD, CS-corrected HRTEM, HAADF-STEM, & 3D electron tomography are discussed. The key issue throughout the study is the atomic ordering in the alloy nanoparticles, in view of excellent hard magnetic properties due to the high magnetocrystalline anisotropy energy (MAE), which is dependent on the long-range order (LRO). The kinetics of atomic ordering plays a crucial role, that is, annealing below a reduced order-disorder transformation temperature is essential in obtaining the L10 ordered phase in small nanoparticles. A novel technique to measure the degree of order in individual particles using NBD and diffraction intensity calculations was proposed, & quantitatively proved the size-dependent degradation of long-range atomic order in nanoparticles. Imaging using CS-corrected HRTEM revealed the atomic structures of the alloy nanoparticles 2-10 nm in diameter.

本文言語English
ホスト出版物のタイトルAdvances in Imaging and Electron Physics
出版社Academic Press Inc.
ページ165-225
ページ数61
DOI
出版ステータスPublished - 2012

出版物シリーズ

名前Advances in Imaging and Electron Physics
170
ISSN(印刷版)1076-5670

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 凝縮系物理学
  • 電子工学および電気工学

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