Magnetic Properties of Mechnically Milled Sm-Co Permanent Magnetic Materials with the TbCu7 Structure

• Joseyphus Raphael Justin

  Materials Science Centre, Department of Nuclear Physics, University of Madras Graduate School of Environmental Studies, Tohoku University

• Narayanasamy Alwarramanujam

  Materials Science Centre, Department of Nuclear Physics, University of Madras

• Gopalan Raghavan

  Defence Metallurgical Research Laboratory

• Chandrasekaran Venkatasubramanian

  Defence Metallurgical Research Laboratory

• Jeyadevan Balachandran

  Graduate School of Environmental Studies, Tohoku University

• Tohji Kazuyuki

  Graduate School of Environmental Studies, Tohoku University

書誌事項

タイトル別名

• Magnetic Properties of Mechanically Milled Sm-Co Permanent Magnetic Materials with the TbCu<SUB>7</SUB> Structure
• Magnetic Properties of Mechanically Milled Sm-Co Permanent Magnetic Materials with the TbCu7 Structure

抄録

The magnetic properties of Sm(Co,Fe,Cu,Zr)₇ compound with the TbCu₇ structure are studied for the mechanically milled samples. The coercivity could be varied, without affecting the saturation magnetization, from 44 kA/m for the micron sized particles to 280 kA/m by reducing the particle size to sub-micron size (600–900 nm) using high-energy ball milling. The enhancement in the coercivity is attributed to the particles approaching single domain size. The presence of dipolar coupling suggests that the grain sizes are well above the exchange length for the milled samples. The thermal measurements indicate that the compound with the TbCu₇ structure is not stable at high temperatures beyond 743 K.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 47 (9), 2264-2268, 2006

  公益社団法人 日本金属学会

キーワード

• Dipolar coupling
• permanent magnetic materials
• mechanical milling
• TbCu<SUB>7</SUB> structure

詳細情報

• CRID: 1390282679227616256
• NII論文ID: 10018248892
• NII論文ID: 130004453299
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.47.2264
• ISSN: 13475320
• ISSN: 13459678
• HANDLE: 10097/52096
• NDL書誌ID: 8061908
• Web Site: https://tohoku.repo.nii.ac.jp/records/42514
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8061908
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/47/9/47_9_2264/_pdf
• 本文言語コード: en
• データソース種別:
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