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Disordered Configuration of Methylammonium of CH_3NH_3PbBr_3 Determined by Single Crystal Neutron Diffractometry

Ferroelectrics Volume 348 Page 182-186
published_at 2007-03
2007020121.pdf
[fulltext] 192 KB
Title
Disordered Configuration of Methylammonium of CH_3NH_3PbBr_3 Determined by Single Crystal Neutron Diffractometry
Creators Mashiyama H.
Creators Kawamura Y.
Creators Kasano H.
Creators Asahi T.
Creators Noda Y.
Creators Kimura H.
Creator Keywords
perovskite structure disordered configuration methylammonium phase transition
In order to understand the mechanism of the structural phase transition in CH_3NH_3PbBr_3, neutron diffraction data from the single crystal is analyzed by the least-squares method and the maximum entropy method. The disordered configuration of a methylammonium ion in a cage surrounded by eight PbBr_6 octahedrons is identified unambiguously. With comparing the low-temperature structure, the transition is characterized by the condensation of the rotational motion of the PbBr_6 octahedron around the Pb-Br axis, which accompanies the partial ordering of the methylammonium ion to reduce the site symmetry.
Languages eng
Resource Type journal article
Publishers Taylor and Francis
Date Issued 2007-03
File Version Author’s Original
Access Rights open access
Relations
[ISSN]0015-0193
[NCID]AA00644949
info:doi/10.1080/00150190701196435
[isVersionOf] [URI]http://www.tandf.co.uk/journals/titles/00150193.asp
Schools 大学院理工学研究科(理学)