Archives of Metallurgy and Materials (Jun 2019)

Study on Magnetic Properties of the U-Type Ferrite According to Substituted Elements

  • Kwang-Pil Jeong,
  • Jeong-Gon Kim,
  • Su-Won Yang,
  • Jae-Ho Yun,
  • Jin-Hyuk Choi

DOI
https://doi.org/10.24425/amm.2019.127567
Journal volume & issue
Vol. vol. 64, no. No 2
pp. 501 – 505

Abstract

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The magnetic properties of the U-type ferrite synthesized by a sol-gel process had studied by substituting cobalt with manganese or zinc in cobalt-based U-type ferrite. The substituted U-type ferrite showed a dominant crystal structure at a different substitution ratio of manganese and zinc. The change of the starting temperature of U-type ferrite formation according to substitutional elements was confirmed by TG-DTA analysis. In the case of manganese substitution, the starting temperature of U-type ferrite formation lowered, and on the contrary, when zinc was substituted, it became higher. The magnetic properties of the U-type ferrite substituted with manganese showed a tendency that the saturation magnetization was decreased and the coercivity was increased as the manganese ratio increased. The highest saturation magnetization was 57.9 emu/g in the specific composition (Ba4Co0.5Zn1.5Fe36O60) substituted with zinc.

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