Open AccessImpact of the Bi substitution on the structural and charge density distribution of Ca0.7La0.3-xBixMnO3 (x = 0, 0.1)
Author(s) -
Bambang Mulyo Raharjo,
Ikhwan Nur Rahman,
Dicky Rezky Munazat,
D. S. Razak,
Umar Zaki Faruq,
Alfin Naufal Nur,
Budhy Kurniawan
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/546/4/042033
Subject(s) - orthorhombic crystal system , ionic radius , rietveld refinement , charge density , crystallography , crystal structure , charge (physics) , diffraction , materials science , powder diffraction , chemistry , ion , physics , quantum mechanics , organic chemistry , optics
The Bi substitution effect on the structure of La 0.3-x Bi x Ca 0.7 MnO 3 (x = 0, 0.1) is observed through the X-ray powder diffraction pattern. The effect of Bi substitution does not significantly change the unit cell size itself. This is due to the size of the Bi 3+ ionic radius which is relatively almost the same as the ionic radius of La 3+ . Through Rietveld refinement, it is confirmed that the samples have the orthorhombic structure with Pnma space group. Changes of the charge density distribution between the atoms of bonds with the Bi substitution are investigated using maximum entropy method (MEM). MEM which is based on the refined structure factors extracted from the Rietveld method provide the information of charge ordering with respect to stronger regularity pattern of charge density distribution.