Inter-particle interaction and thermal stability of ultra-fine Ba ferrite particles for high-density recording

Toshiyuki Suzuki, Terumitsu Tanaka

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

Newly developed ultra-fine Ba ferrite particles, having the mean diameters of 21.9-41.5nm, were used to prepare encapsulated powder samples and sheet samples. The powder samples and non-oriented sheet samples exhibited almost zero amplitude in δM peaks; however, the longitudinally oriented sheet samples showed positive δM peaks, implying that positive interaction acts among particles. It was clarified that this positive interaction accelerates magnetization time decay, when the applied reverse field is greater than some fraction of Hc, but it suppresses the time decay when the reverse field is smaller than the value. The magnetization time decay in the presence of a large reverse field was noticeable when particle diameters were < 30nm.

本文言語英語
ページ(範囲)328-330
ページ数3
ジャーナルJournal of Magnetism and Magnetic Materials
242-245
PART I
DOI
出版ステータス出版済み - 4 1 2002

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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