Mössbauer study of zinc-substituted strontium cobalt Z-type hexaferrite

Takeyuki Kikuchi, Masafumi Kobune, Makoto Nakanishi, Tatsuo Fujii

Research output: Contribution to journalArticle

Abstract

Polycrystalline powder samples of the zinc-substituted strontium cobalt Z-type hexaferrite: Sr3Co2-x Zn x Fe24O41 (x = 0, 0.5, 1.0, 1.5 and 2.0) were prepared by the polymerizable complex method. Their Mössbauer spectra were measured at room temperature with conventional constant-acceleration spectrometer. Obtained Mössbauer spectra were numerically separated into six discrete components. The relationship between Mössbauer parameters and magnetic properties has been discussed. From the values of the isomer shift, it was found that the iron ion in Sr3Co2-x Zn x Fe24O41 is trivalent with high spin. The value of the quadrupole splitting increased and changed the sign from negative to positive for the sample with x = 1.5. From the results mentioned above and the analysis of the complex permeability spectra, the magnetocrystalline anisotropy of Sr3Co2-x Zn x Fe24O41 is changed from c-plane to c-axis at Zn content between x = 1.0 and 1.5. The compositional dependence of the areas of each subspectra showed that Zn2+ ions occupy the sites with down spin at the compositional range of x = 0.0-1.0.

Original languageEnglish
JournalCeramics International
DOIs
Publication statusAccepted/In press - 2017

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Strontium
Cobalt
Zinc
Ions
Magnetocrystalline anisotropy
Isomers
Powders
Spectrometers
Magnetic properties
Iron
Temperature

Keywords

  • B. Spectroscopy
  • C. Magnetic properties
  • D. Ferrites
  • E. Soft magnets

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Mössbauer study of zinc-substituted strontium cobalt Z-type hexaferrite. / Kikuchi, Takeyuki; Kobune, Masafumi; Nakanishi, Makoto; Fujii, Tatsuo.

In: Ceramics International, 2017.

Research output: Contribution to journalArticle

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abstract = "Polycrystalline powder samples of the zinc-substituted strontium cobalt Z-type hexaferrite: Sr3Co2-x Zn x Fe24O41 (x = 0, 0.5, 1.0, 1.5 and 2.0) were prepared by the polymerizable complex method. Their M{\"o}ssbauer spectra were measured at room temperature with conventional constant-acceleration spectrometer. Obtained M{\"o}ssbauer spectra were numerically separated into six discrete components. The relationship between M{\"o}ssbauer parameters and magnetic properties has been discussed. From the values of the isomer shift, it was found that the iron ion in Sr3Co2-x Zn x Fe24O41 is trivalent with high spin. The value of the quadrupole splitting increased and changed the sign from negative to positive for the sample with x = 1.5. From the results mentioned above and the analysis of the complex permeability spectra, the magnetocrystalline anisotropy of Sr3Co2-x Zn x Fe24O41 is changed from c-plane to c-axis at Zn content between x = 1.0 and 1.5. The compositional dependence of the areas of each subspectra showed that Zn2+ ions occupy the sites with down spin at the compositional range of x = 0.0-1.0.",
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AU - Kikuchi, Takeyuki

AU - Kobune, Masafumi

AU - Nakanishi, Makoto

AU - Fujii, Tatsuo

PY - 2017

Y1 - 2017

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AB - Polycrystalline powder samples of the zinc-substituted strontium cobalt Z-type hexaferrite: Sr3Co2-x Zn x Fe24O41 (x = 0, 0.5, 1.0, 1.5 and 2.0) were prepared by the polymerizable complex method. Their Mössbauer spectra were measured at room temperature with conventional constant-acceleration spectrometer. Obtained Mössbauer spectra were numerically separated into six discrete components. The relationship between Mössbauer parameters and magnetic properties has been discussed. From the values of the isomer shift, it was found that the iron ion in Sr3Co2-x Zn x Fe24O41 is trivalent with high spin. The value of the quadrupole splitting increased and changed the sign from negative to positive for the sample with x = 1.5. From the results mentioned above and the analysis of the complex permeability spectra, the magnetocrystalline anisotropy of Sr3Co2-x Zn x Fe24O41 is changed from c-plane to c-axis at Zn content between x = 1.0 and 1.5. The compositional dependence of the areas of each subspectra showed that Zn2+ ions occupy the sites with down spin at the compositional range of x = 0.0-1.0.

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