Exchange-coupled FePtB nano-composite hard magnets produced by pulsed laser deposition

Neelam Kaushik, Parmanand Sharma, Sandeep Nagar, K. V. Rao, Hisamichi Kimura, Akihiro Makino, Akihisa Inoue

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Nano-composite FePtB thin films were deposited on naturally oxidized (1 0 0) silicon (Si) and glass (SiO2) substrates by using a pulsed laser deposition (PLD) technique. Effects of processing conditions on structural, surface and magnetic properties of the films were examined. Growth temperature (Ts) and the type of substrate (Si or SiO2) are shown to affect crystal structure and magnetic properties of FePtB thin films significantly. Under optimized processing conditions, a ∼1.7 μm thick FePtB film deposited on a glass substrate exhibits high coercivity (∼7.7 kOe), high reduced remanence [(Mr/Ms) ∼ 0.9] and high energy product (BH)max = 71 kJ/m3. The films exhibiting good hard magnetic properties are mainly made-up of nano-sized hard (L10-FePt) and soft (iron-boride) magnetic phases, which are shown to be exchange coupled. Fabrication of hard magnetic thin films by a simple and fast technique such as PLD is very promising for the production of micro magnets for MEMS applications.

本文言語English
ページ(範囲)62-68
ページ数7
ジャーナルMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
171
1-3
DOI
出版ステータスPublished - 2010 7月 25

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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