Structural and magnetic properties of barium-gadolinium hexaferrites

G. Litsardakis, I. Manolakis, C. Serletis, K. G. Efthimiadis

Research output: Contribution to journalArticlepeer-review

Abstract

A series of Gd-substituted M-type barium hexaferrites has been prepared by the ceramic route, according to the formula (Ba1-xGdx)O·5.25Fe2O3 (x = 0 - 0.30). XRD analysis revealed that all the samples present primarily an M-type structure. Samples x = 0 and x = 0.05 are single-phase. Hematite (Fe2O3) and GdFeO3 were detected in the remaining samples. Coercivity (Hc) shows remarkably high values, ∼293 kA/m for x = 0.20 and 0.30 with a maximum of 322 kA/m for x = 0.25. Specific saturation magnetization (σsat) of the samples presents a small increase up to x = 0.10. The microstructure examination indicates that Gd may act as a grain growth inhibitor.

Original languageEnglish
Pages (from-to)e884-e886
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 3
DOIs
Publication statusPublished - Mar 2007
Externally publishedYes

Keywords

  • M-type hexaferrites
  • Magnetic properties
  • Permanent magnets
  • Rare earth substitution

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