The effect of Ca-doping on structure and microstructure of La 0.7 (Ba 1- x Ca x ) 0.3 MnO 3

Budhy Kurniawan R., S. Winarsih, M. R. Ramadhan, A. Naomi, W. Laksmi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

In this paper, we explore the structure and microstructure of La 0.7 (Ba 1- x Ca x ) 0.3 MnO 3 (x = 0.1; 0.3; 0.5). These materials are one member of perovskite manganites materials. The general structure is R 1- x A x MnO 3 (R = rare earth, A = divalent atoms). Doping in A site or Mn site would impact to the structure and microstructure of these materials. It is called distortion crystal structure. This distortion would influence the transport properties of perovskite manganite materials. In this study, the materials were prepared by a sol-gel method. It is shown that increasing Ca concentration as doping in A site did not make any phase changing, but there are changes in lattice parameter of La 0.7 (Ba 1- x Ca x ) 0.3 MnO 3 . Scanning electron microscope (SEM) was used to determine microstructure of these materials. From this measurement, we know that all materials consist of closed packed grains with equiaxed grain morphology randomly oriented. The compositional purity of all materials is confirmed by Energy Dispersive X-ray (EDX). It is concluded that the presence of Ca-doping in La 0.7 (Ba 1- x Ca x ) 0.3 MnO 3 is remaining single phase but affected the structure and microstructure of these materials. By using a core-shell model and bandwidth theory, there is a correlation between changes in structure and microstructure to the transport properties of these materials.

Original languageEnglish
Title of host publicationInternational Symposium on Current Progress in Mathematics and Sciences 2016, ISCPMS 2016
Subtitle of host publicationProceedings of the 2nd International Symposium on Current Progress in Mathematics and Sciences 2016
EditorsKiki Ariyanti Sugeng, Djoko Triyono, Terry Mart
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735415362
DOIs
Publication statusPublished - 10 Jul 2017
Event2nd International Symposium on Current Progress in Mathematics and Sciences 2016, ISCPMS 2016 - Depok, Jawa Barat, Indonesia
Duration: 1 Nov 20162 Nov 2016

Publication series

NameAIP Conference Proceedings
Volume1862
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference2nd International Symposium on Current Progress in Mathematics and Sciences 2016, ISCPMS 2016
CountryIndonesia
CityDepok, Jawa Barat
Period1/11/162/11/16

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