School of Chemistry, The University of Sydney, New South Wales 2006, Australia.
J Phys Condens Matter. 2013 Aug 21;25(33):335401. doi: 10.1088/0953-8984/25/33/335401. Epub 2013 Jul 24.
The nuclear and magnetic structures and properties of Sr0.65Pr0.35-xCexMnO3 (0.00 ≤ x ≤ 0.35) were investigated using a combination of synchrotron x-ray and neutron powder diffraction, along with magnetic and x-ray absorption near edge structure measurements. At room temperature, doping with Ce results in a transition from a tetragonal structure in I4/mcm to an orthorhombic one in Imma associated with the loss of long range orbital ordering. At low temperatures, we observe the formation of an orthorhombic Fmmm phase. XANES measurements demonstrate that the Ce exists as a mixture of Ce(3+) and Ce(4+).
采用同步加速器 X 射线和中子粉末衍射，以及磁性和 X 射线吸收近边结构测量，研究了 Sr0.65Pr0.35-xCexMnO3（0.00≤x≤0.35）的核和磁结构及性质。在室温下，Ce 的掺杂导致从 I4/mcm 的四方结构转变为 Imma 的正交结构，同时伴随着长程轨道有序的丧失。在低温下，我们观察到正交 Fmmm 相的形成。XANES 测量表明 Ce 以 Ce(3+)和 Ce(4+)的混合物形式存在。
