Razali, Sufia Aqilah and Ibrahim, Norazilah and Shamsuddin, Suhadir and Noh, Mohamad Zaky (2018) Observation of charge ordering signal in monovalent doped Nd0.75Na0.25-xKxMn1O3 (0 ≤ x ≤ 0.10) manganites. International Journal of Engineering and Technology, 7 (4.3). pp. 85-88. ISSN 2227-524X
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K doping in the compound of Nd0.75Na0.25-xKxMn1O3 (x = 0, 0.05 and 0.10) manganites have been investigated to study its effect on crystalline phase and surface morphology as well as electrical transport and magnetic properties. The structure properties of the Nd0.75Na0.25- xKxMnO3 manganite have been characterized using X-ray diffraction measurement and it proved that the crystalline phase of samples were essentially single phased and indexed as orthorhombic structure with space group of Pnma. The morphological study from scanning electron microscope showed there was an improvement on the grains boundaries and sizes as well as the compactness with K doping suggestively due to the difference of ionic radius. On the other hand, DC electrical resistivity measurement showed all samples exhibit insulating behavior. However, analysis of dlnρ/dT-1 vs. T revealed the clearly peaks could be observed at temperature 210K for x = 0 and the peaks were shifted to the lower temperature around 190 K and 165 K for x = 0.05 and x = 0.1 respectively, indicate the existence of charge ordering (CO) state in the compound. Meanwhile, the investigation on magnetic behavior showed all samples exhibit transition from paramagnetic phase to anti-ferromagnetic phase with decreasing temperature and the TN was observed to shift to lower temperature suggestively due to weakening of CO state
| Item Type: | Article |
|---|---|
| Additional Information: | AC Susceptibility; DC Electrical; Scanning Electron Microscope; X-Ray Diffraction. |
| Subjects: | T Technology > TP Chemical technology > TP250-261 Industrial electrochemistry |
| Divisions: | Faculty of Applied Science and Technology > Department of Physics and Chemistry |
| Depositing User: | UiTM Student Praktikal |
| Date Deposited: | 02 Dec 2021 03:31 |
| Last Modified: | 02 Dec 2021 03:31 |
| URI: | http://eprints.uthm.edu.my/id/eprint/4324 |
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