Cation distribution analysis of Sr–La–Co M-type ferrites by neutron diffraction, extended X-ray absorption fine structure and X-ray magnetic circular dichroism

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概要

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• The occupation sites of lanthanum and cobalt ions in the La–Co substituted M type ferrite Sr1−xLaxCoxFe11.6−xO19, where x = 0.20 to 0.35, were analyzed by the neutron diffraction, the extended X-ray absorption fine structure (EXAFS) and the X-ray magnetic circular dichroism (XMCD) in order to understand the relationship between the local structure and the improvements of magnetic characteristics in the La–Co substituted M-type ferrite. The results of EXAFS analysis suggest that Co is partitioned in the 4f1, 2a and 12k sites, which is in a good agreement with the results of the neutron diffraction analysis. XMCD measurements also indicate that the ferric ions at the tetrahedral site 4f1 is replaced by elements of a smaller magnetic moment.

著者

• NISHIUCHI Takeshi

  Magnetic Materials Research Laboratory, NEOMAX Company, Hitachi Metals, Ltd.

• Nishiuchi Takeshi

  Magnetic Materials Research Laboratory Neomax Company Hitachi Metals Ltd.

• KOBAYASHI Yoshinori

  Magnetic Materials Research Laboratory, NEOMAX Company, Hitachi Metals, Ltd.

• ODA Etsushi

  Magnetic Materials Research Laboratory, NEOMAX Company, Hitachi Metals, Ltd.

• NAKAGAWA Takashi

  Management of Industry and Technology, Graduate School of Engineering, Osaka University

関連論文

• Detection of Neodymium-Rich Phase for Development of Coercivity in Neodymium-Iron-Boron-Based Alloys with Submicron-Sized Grains Using Positron Lifetime Spectroscopy
• Relationship between Coercivity and Microstructural Changes During DR Treatment in the HDDR-processed Nd-Fe-Co-B Alloy
• Cation distribution analysis of Sr–La–Co M-type ferrites by neutron diffraction, extended X-ray absorption fine structure and X-ray magnetic circular dichroism

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