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Weissenberg-type neutron diffraction camera and its application to the structural and magnetic phase transitions of KMnF3

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Abstract

A Weissenberg-type neutron diffraction camera (W-NDC) equipped with a neutron imaging-plate (NIP) has been developed. The W-NDC gives Weissenberg-type and rotational diffraction patterns at low-temperature (10 K<T<300 K) and high-temperature (300 K<T<800 K) regions. To reduce background counts of the NIP diffracted from the aluminum containers and the specimen holder, a radial slit with several polymer sheets coated with 6LiF powder is continuously oscillated around the specimen during measurements. A test structural analysis for a single crystal NaCl suggests that the integrated intensities of reflections obtained from the Weissenberg-type diffraction patterns adequately satisfy a structural refinement by means of a least square method, though a fading effect of the photon energy stored in the NIP should be regarded during measurements. Structural and magnetic phase transitions in KMnF3 have been studied by using the W-NDC, to eliminate an inconsistency for temperature, and to enable an ordering of the phase transition as reported.

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Authors and Affiliations

  1. Department of Physics, Faculty of Science, Kyushu University, 33, Fukuoka, 812-8581, Japan

    S. Watanabe, M. Yoshimura & M. Hidaka

  2. Neutron Scattering Laboratory, ISSP, University of Tokyo, Tokai, Ibaraki, 319-1106, Japan

    S. Watanabe & H. Yoshizawa

Authors
  1. S. Watanabe
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  2. M. Yoshimura
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  3. M. Hidaka
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  4. H. Yoshizawa
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Corresponding author

Correspondence to M. Hidaka.

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PACS

61.12.Ld; 64.70.Kb; 61.72.-y

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Watanabe, S., Yoshimura, M., Hidaka, M. et al. Weissenberg-type neutron diffraction camera and its application to the structural and magnetic phase transitions of KMnF3 . Appl. Phys. A 84, 87–94 (2006). https://doi.org/10.1007/s00339-006-3599-8

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  • DOI: https://doi.org/10.1007/s00339-006-3599-8

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