Crystal-site-selective spectrum of Fe3BO6 by synchrotron Mössbauer diffraction with pure nuclear Bragg scattering

Shin Nakamura, Takaya Mitsui, Kosuke Fujiwara, Naoshi Ikeda, Masayuki Kurokuzu, Susumu Shimomura

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Abstract

We have succeeded in obtaining the crystal-site-selective spectra of the collinear antiferromagnet Fe3BO6 using a synchrotron Mössbauer diffractometer with pure nuclear Bragg scattering at SPring-8 BL11XU. Well-resolved 300, 500, and 700 reflection spectra, having asymmetric line shapes owing to the higher-order interference effect between the nuclear energy levels, were quantitatively analyzed using a formula based on the dynamical theory of diffraction. Reasonable hyperfine parameters were obtained. The intensity ratio of Fe1 to Fe2 subspectra is in accordance with the nuclear structure factor. However, when the spectrum is measured at the peak position of the rocking curve (very near the Bragg position), the value of the center shift deviates from its intrinsic value. This is also due to the dynamical effect of γ-ray diffraction. To avoid this problem, it is necessary to use diffraction angles near the foot of the rocking curve, approximately 0.02° apart from the peak position.

Original languageEnglish
Article number084701
Journaljournal of the physical society of japan
Volume86
Issue number8
DOIs
Publication statusPublished - Aug 15 2017

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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