Revisiting La0.5Sr1.5MnO4 lattice distortion and charge ordering with multi‐beam resonant diffraction. Issue 1 (10th November 2016)

• Record Type: Journal Article
• Authors: Liu, Wen-Chung; Chiu, Yi-Hua; Kung, Ying-Yu; Liao, Po-Yu; Cheng, Chih-Hao; Chih, Yu-Chieh; Tsai, Yi-Wei; Chu, Chia-Hung; Lai, Chia-Hung; Huang, Di-Jing; Soo, Yun-Liang; Chang, Shih-Lin
• Is Part Of: Acta crystallographica. Volume 73:Issue 1(2017:Jan.)
• Page Start: 46
• Page End: 53
• Publication Date: 2016-11-10
• Subjects: X‐ray multiple diffraction -- dynamical X‐ray diffraction theory -- La0.5Sr1.5MnO4; Crystallography -- Periodicals; Condensed matter -- Periodicals; 548
• DOI: 10.1107/S2053273316013759
• Languages: English
• ISSNs: 2053-2733

Abstract

Abstract : Sinusoidal wave type distortions of La0.5 Sr1.5 MnO4 in the low‐temperature orthorhombic phase were observed using multi‐beam resonant X‐ray diffraction and dynamical theory. Abstract : Sinusoidal wave type distortions of La0.5 Sr1.5 MnO4 in the low‐temperature orthorhombic phase were observed using multi‐beam resonant X‐ray diffraction (MRXD) with (7/4 7/4 0) fractional primary diffraction. Two four‐beam diffractions with opposite asymmetry were measured at 6.5545 keV and compared with the curves simulated by the dynamical X‐ray diffraction theory. This approach provides the possibility of resolving the distortion modes which are perpendicular to the momentum transfer by a single azimuthal scan. The paper also demonstrates the sensitivity of MRXD profiles versus incident X‐ray energy in the vicinity of the Mn K edge to the charge disproportion between the two manganese sites, reconfirming the small charge disproportion feature.