Determination of Cation Distribution in Mn–Zn–Fe Ferrite by X-Ray Anomalous Scattering
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概要
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Site preferency of cations in Mn–Zn–Fe ferrite, Mn0.54Zn0.35Fe2.11O4, has been investigated using spherical single crystals with synchrotron X-rays. The anomalous scattering effect was applied to diffraction experiments in a four-circle diffractometry at wavelengths of 1.7535 and 1.2934 Å which are 0.01 Å longer than Fe K- and Zn K-absorption edges, respectively. The two-wavelengths anomalous dispersion (TWAD) method allowed us to determine the cation distributions accurately with a large difference in atomic scattering factors. The result shows that all Mn and Zn ions fully occupy the tetrahedral A sites within the experimental errors, suggesting that Mn–Zn–Fe ferrite has the crystal structure of a typical normal spinel. The chemical formula is [Mn0.54Zn0.34Fe0.12]A[Zn0.01Fe1.99]BO4. The cell dimension and u parameter are a=8.4727±0.0006 Å and u=0.2609±0.0002, respectively.
- Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
- 1998-06-15
著者
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Okita Atsushi
Materials And Structures Laboratory Tokyo Institute Of Technology
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TOYODA Takeshi
Materials and Structure Laboratory, Tokyo Institute of Technology
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Koinuma Hideomi
Materials And Structures Labolatory Tokyo Institute Of Technology
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Saito Fumikazu
Materials And Structure Laboratory Tokyo Institute Of Technology
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Sasaki Satoshi
Materials And Structures Laboratory Tokyo Institute Of Technology
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Toyoda Takeshi
Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta 4259, Midori, Yokohama 226-8503, Japan
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Koinuma Hideomi
Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta 4259, Midori, Yokohama 226-8503, Japan
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Okita Atsushi
Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta 4259, Midori, Yokohama 226-8503, Japan
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Sasaki Satoshi
Materials and Structure Laboratory, Tokyo Institute of Technology, Nagatsuta 4259, Midori, Yokohama 226-8503, Japan
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