NMR and Magnetic Studies of Mechanically Alloyed Co₃₀M₇₀(M=Cu, Ag, Au)

• Hiraoka Koichi

  Faculty of Engineering, Ehime University

• Sasaki Yasuhiro

  Faculty of Engineering, Ehime University

• Tomiyoshi Shoichi

  Faculty of Engineering, Ehime University

書誌事項

タイトル別名

• NMR and Magnetic Studies of Mechanically Alloyed Co30M70 (M=Cu, Ag, Au)

抄録

Zero-field ⁵⁹Co NMR, X-ray diffraction (XRD) and magnetization measurements have been made to investigate the mechanical alloying (MA) of ferromagnetic Co₃₀M₇₀ (M=Cu, Ag and Au) powder as a function of milling time (MT). The MA in Co₃₀Cu₇₀ proceeds rapidly with increasing MT by both the processes of dissolving Cu in the Co matrix and Co in the Cu matrix and is nearly completed for MT=100 h. In Co₃₀Ag₇₀ the MA hardly proceeds even for MT=300 h or more. The MA in Co₃₀Au₇₀ proceeds much more slowly than that in Co₃₀Cu₇₀ with increasing MT up to 150 h and takes place rapidly for MT≈200 h. The magnetizations and NMR spectra of the Co₃₀Cu₇₀ and Co₃₀Au₇₀ samples for MT=200 h are similar to each other, indicating that both the samples form similar supersaturated alloys. NMR results of the Co₃₀M₇₀ samples milled for MT=200 h show large spin fluctuations of Co atoms, which are due to fine sizes of clusters, suggesting that the samples milled for long times consist of nanometer-size clusters.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 74 (9), 2598-2603, 2005

  一般社団法人 日本物理学会

キーワード

• mechanical alloying
• supersaturated alloys
• NMR

詳細情報

• CRID: 1390282679164889344
• NII論文ID: 210000105654
• NII論文ID: 110002245749
• NII論文ID: 130004539417
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.74.2598
• BIBCODE: 2005JPSJ...74.2598H
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 7439643
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7439643
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.74.2598
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
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