| Issue |
ITM Web Conf.
Volume 61, 2024
The 9th International Symposium on Current Progress in Mathematics and Sciences 2023 (The 9th ISCPMS 2023) in conjunction with AUA Academic Conference on the Application of Artificial Intelligences and Data Sciences in a Modern Science for a Better Life
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| Article Number | 01024 | |
| Number of page(s) | 7 | |
| DOI | https://doi.org/10.1051/itmconf/20246101024 | |
| Published online | 10 January 2024 | |
Room temperature properties of microstructure and resistivity of alkaline earth – doped on lanthanide manganite
1 Department of Physics Education, Faculty of Tarbiya and Teaching Science (FITK), UIN Syarif Hidayatullah, Jakarta 15412, Indonesia
2 Department of Physics, Faculty of Sceince and Technology (FST), UIN Syarif Hidayatullah, Jakarta 15412, Indonesia
3 Department of Physics Education, Faculty of Teacher Training and Education (FKIP), Universitas Sebelas Maret, Surakarta 57126, Indonesia
4 Research Center for Advanced Material, National Research and Innovation Agency (BRIN), Puspiptek Area, South Tangerang, Banten 15314, Indonesia
* Corresponding author: dwi.nanto@uinjkt.ac.id
Microstructure of material has a strong relation with resistivity property. Here we report our interesting sample of La0.7(Sr1-xBax)0.3MnO3 (x = 0, 0.3, 0.6, and 0.9) material that has been synthesized by using sol-gel method successfully. All pattern of X-ray diffractometer (XRD) on the successful samples show that all samples are single phase confirmed without significant crystal disorder. The XRD pattern refinement yield that all samples formed R-3c space group with a rhombohedral structure. Although the substitution of Ba2+ to Sr2+ ions have significant difference in atomic radius; it does not change the crystal structure. However, the alkaline earth – doped on lanthanide manganite causes a change in lattice parameters which is followed by shifted of average crystal size, bond length, cell unit volume and bond angle at Mn-O-Mn. The microstructure results by means of scanning electron microscope (SEM) characterization shows that substitution of Ba2+ ions decrease the grain size and yield agglomeration. The relation on the microscopic result resistively confirmed by cryogenic magnetometer characterization in the concentration x = 0 has minimum resistivity of 1.28.10-3 Ωm and the maximum resistivity in the concentration x = 0.9 is 1.85.10-1 Ωm. The Ba2+ doped into Sr2+ in lanthanum manganite may cause a wider resistivity range.
Key words: Manganite perovskite / sol-gel / grain size / resistivity
© The Authors, published by EDP Sciences, 2024
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