Ultrafine SrM particles with high coercivity by chemical coprecipitation

Jianfeng Wang, Clive Ponton, Ivor Harris

Research output: Contribution to journalArticle

25 Citations (Scopus)


Ultrafine (similar to80nm). single domain Sr hexaferrite (SrM) particles with Sill additives were produced by chemical coprecipitation. The effects of the Sm3+, Sr2+ ratio on the crystallography and magnetic properties of Sm doped SrM ultrafine particles have been investigated. A very high coercity of 528 kA in (6635Oe) with a magnetisation at 1100 kA/m of 63.07 J/T kg was obtained for the sample of Sm3+/Sr2+ = (1)/(14) calcined at 850 degreesC lor 2 h in air. (C) 2002 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1464-1467
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Publication statusPublished - 1 Apr 2002


  • Sm doping
  • chemical coprecitation
  • Sr hexaferrite
  • magnetic properties


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