メカニカルアロイング法により作製したＣｏｘＣｕ１００－ｘ合金の磁気抵抗と磁性

• 上田 勇治

  室蘭工業大学

• 池田 正二

  室蘭工業大学

• 近澤 進

  室蘭工業大学

書誌事項

タイトル別名

• Magnetoresistance and Magnetism in CoxCu100-x Alloys Produced by Mechanical Alloying.

抄録

Co_xCu_100-x (x= 10-30) alloys were prepared by mechanically milling mixtures of elemental Co and Cu powders. The structure, magnetoresistance (MR), and magnetic properties were examined for the as-milled and annealed alloys. The hcp-Co phase disappeared after milling for 50 h, and the Co atoms were dissolved in the fcc-Cu phase. The MR ratio showed a maximum of 6.7% (15 kOe, room temperature) at a Co concentration of x = 20. For higher Co concentrations, the annealing temperature needed to produce high magnetoresistance was lower and the annealing time was shorter. The Co_xCu_100-x alloy with x=20 showing a maximum MR exhibited superparamagnetic behavior, but had a slight ferromagnetic state. The average grain size of Co particles, estimated from the temperature dependence of magnetization, was 5-7 nm.

収録刊行物

• 日本応用磁気学会誌

  日本応用磁気学会誌 20 (2), 381-384, 1996

  公益社団法人 日本磁気学会

キーワード

• mechanical alloying
• Co_<i>x</i>Cu_100-<i>x</i> alloy
• magnetoresistance
• magnetization curve
• X-ray diffraction
• lattice constant

詳細情報

• CRID: 1390282680070001920
• NII論文ID: 20000346270
• NII書誌ID: AN0031390X
• DOI: 10.3379/jmsjmag.20.381
• COI: 1:CAS:528:DyaK28XivFCgsr0%3D
• ISSN: 18804004
• ISSN: 02850192
• ISSN: http://id.crossref.org/issn/02850192
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可