Effect of specific surface area of raw material Fe2O3 on magnetic properties of YIG

Ching Chien Huang, Wei Zong Zuo, Yung Hsiung Hung, Jing Yi Huang, Ming Feng Kuo, Chun Hu Cheng

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The effect of specific surface area (SSA) of Fe2O3 was investigated while evaluating the raw material of Y3Fe5O12 (yttrium iron garnet (YIG)) preparation. For YIG ferrite, the specific surface area of Fe2O3, rather than average particle size (D50), was found to markedly affect the mixing homogeneity of powders in the mixing procedure and the magnetic properties. Increasing the specific surface area of Fe2O3 resulted in the increase of the remanence (Br) and squareness ratio (SQR); meanwhile, it also caused an obvious reduction in coercivity (HC) for the sintered specimens. An upgrade in the specific surface area of raw material Fe2O3 could further resulted in a decrease in slurry viscosity in the mixing procedure, which promotes slurry mixing homogeneity and further promotes reactivity in the calcination and sintering processes. Consequently, a larger Br and SQR and a smaller HC were obtained. In addition, good ferromagnetic resonance (FMR) line width (i.e., ΔH) properties were also realized as 36.7 Oe at 3.2 GHz using the selected Fe2O3. As found in this study, the strict control of raw material Fe2O3 is critical in tailoring suitable Br and HC for the YIG ferrite manufacturing process.

Original languageEnglish
Pages (from-to)157-164
Number of pages8
JournalJournal of Magnetism and Magnetic Materials
Volume449
DOIs
Publication statusPublished - 2018 Mar 1

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Keywords

  • (BH)
  • FeO
  • H
  • PARTICLE size
  • Remanence (B)
  • Specific surface area (SSA)
  • Squareness ratio (SQR)
  • Yttrium iron garnet (YIG) ferrite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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