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Acta Phys. -Chim. Sin. ›› 2000, Vol. 16 ›› Issue (04): 312-316.doi: 10.3866/PKU.WHXB20000405

• ARTICLE • Previous Articles     Next Articles

Preparation and Mössbauer Studies of α-Fe2O3 Nanoparticle

Jiang Ji-Sen, Gao Lian, Yang Xie-Long, Guo Jing-Kun   

  1. Department of Chemistry and Physics,East China Normal University,Shanghai 200062|The State Key Laboratory on High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050
  • Received:1999-07-04 Revised:1999-09-20 Published:2000-04-15
  • Contact: Jiang Ji-Sen

Abstract:

α-Fe2O3 nanoparticle with diameter of 10 nm was prepared by high energy ball milling directly from coarse α-Fe2O3 powders. It was found that the Mossbauer spectrum of the α-Fe2O3 nanoparticle at room temperature showed magnetic splitting sexlet lines broadened asymmetrically toward the central peaks .The asymmetric broadening of the spectral peaks could be attributed to the collective magnetic excitations. The anisotropic constant of the α-Fe2O3 nanoparticle exhibited a very high value (K=8.9×103J•m-3).

Key words: Nanoparticle, α-Fe2O3, Anisotropic constant, High energy ball milling, Mfont-size: 10.5pt, mso-bidi-font-size: 15.0pt, mso-fareast-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, össbauer spectrum')">mso-bidi-language: AR-SA" lang="EN-US">össbauer spectrum