4.5 Article

Influence of vacuum sintering on microstructure and magnetic properties of magnetostrictive cobalt ferrite

期刊

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 321, 期 17, 页码 2528-2532

出版社

ELSEVIER
DOI: 10.1016/j.jmmm.2009.03.021

关键词

Anisotropy coefficient; Cobalt ferrite; Magnetoelastic property; Magnetostriction; Vacuum sintering

资金

  1. UK Engineering and Physical Science Research Council [EP/057094]
  2. US National Science Foundation [DMR-0402716]
  3. Engineering and Physical Sciences Research Council [EP/D057094/1] Funding Source: researchfish
  4. EPSRC [EP/D057094/1] Funding Source: UKRI

向作者/读者索取更多资源

Differences in the microstructure and magnetic properties of highly magnetostrictive cobalt ferrite resulting from the effects of different vacuum sintering temperatures and times have been investigated. A vacuum environment was chosen to allow direct comparison of results with air-sintered samples which are more often reported in the literature. It was found that vacuum sintering resulted in the development of a solid solution second phase with composition Co1-xFexO4 (x similar to 0.33). There was a decrease in magnetostriction as a result of the formation of the second phase. Furthermore, differences in sintering temperatures were found to have a greater effect on the magnetostriction than differences in sintering times. It was found that the first order cubic anisotropy coefficient initially increased with both sintering temperature and time, before peaking and decreasing to its lowest measured value. The lowest anisotropy was therefore achieved with samples sintered at higher temperatures and longer times. (C) 2009 Elsevier B.V. All rights reserved.

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