Structural Change Caused by Substitution of Nd for Sm in (Nd, Sm)AlO 3 : Application of Synchrotron High‐Resolution Powder X‐ray Diffraction | Zendy

Saitow Akihiro | Zendy; Yoshikawa Akira | Zendy; Horiuchi Hiroyuki | Zendy; Shishido Toetsu | Zendy; Fukuda Tsuguo | Zendy; Tanaka Masahiko | Zendy; Mori Takeharu | Zendy; Sasaki Satoshi | Zendy

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Structural Change Caused by Substitution of Nd for Sm in (Nd, Sm)AlO 3 : Application of Synchrotron High‐Resolution Powder X‐ray Diffraction

Author(s) -

Saitow Akihiro,

Yoshikawa Akira,

Horiuchi Hiroyuki,

Shishido Toetsu,

Fukuda Tsuguo,

Tanaka Masahiko,

Mori Takeharu,

Sasaki Satoshi

Publication year - 1998

Publication title -

journal of applied crystallography

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.429

H-Index - 162

ISSN - 1600-5767

DOI - 10.1107/s0021889898001629

Subject(s) - orthorhombic crystal system , ionic radius , crystallography , crystal structure , powder diffraction , synchrotron , x ray crystallography , materials science , full width at half maximum , lattice constant , diffraction , x ray , rietveld refinement , lattice (music) , synchrotron radiation , chemistry , ion , optics , physics , acoustics , optoelectronics , organic chemistry

Structural change caused by substitution of Nd for Sm in perovskite (Nd, Sm)AlO 3 was analysed by application of high‐resolution powder X‐ray diffraction using synchrotron radiation. The parallel, well monochromated and bright incident X‐rays improved the full width at half‐maximum (FWHM) to 0.027° in a wide 2θ range for the standard Si powder. Applying this high‐resolution optical system, the lattice parameters of the solid solution (Nd x , Sm)AlO 3 were precisely analysed for the phases from x 0.0 to 1.0 with an interval of 0.2. The lattice parameters of a series of R AlO 3 vary systematically with the average ionic radii of , accompanying a structural change from orthorhombic to a trigonal system at around Å corresponding to average ionic radii of . In orthorhombic phases, deformation of the crystal lattice from its ideal cubic lattice is minimized at around x 0.0–0.2 in (Nd x , Sm)AlO 3 and increased with increasing average ionic radii of Nd and Sm. The structure changes from orthorhombic to trigonal at around x 0.7.

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