Effect of rare earth elements substitution in La site for LaMnO3 Manganites
With a view to understanding the effect of rare earth element (Ce, Pr, Nd, Sm and Gd) substitution for the La site in LaMnO3 (LMO), the samples were prepared via solid-state reaction. Structure investigation by X-ray diffraction (XRD) showed that structure transformation from trigonal (LMO) to ortho...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Universiti Putra Malaysia Press
2012
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| Online Access: | http://psasir.upm.edu.my/id/eprint/40435/1/6.%20Effect%20of%20rare%20earth%20elements%20substitution%20in%20la%20site%20for%20LaMnO3%20Manganites.pdf |
| _version_ | 1825949600944488448 |
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| author | Wong, Jen Kuen Lim, Kean Pah Shaari, Abdul Halim Chen, Soo Kien Ng, Siau Wei Gan, Albert Han Ming |
| author_facet | Wong, Jen Kuen Lim, Kean Pah Shaari, Abdul Halim Chen, Soo Kien Ng, Siau Wei Gan, Albert Han Ming |
| author_sort | Wong, Jen Kuen |
| collection | UPM |
| description | With a view to understanding the effect of rare earth element (Ce, Pr, Nd, Sm and Gd) substitution for the La site in LaMnO3 (LMO), the samples were prepared via solid-state reaction. Structure investigation by X-ray diffraction (XRD) showed that structure transformation from trigonal (LMO) to orthorhombic (PMO, NMO, SMO and GMO) occurred when smaller trivalent rare earth element was replaced. The MnO6octahedra were tilted and elongated or compressed, corresponding to the ionic radii of the rare earth inserted. Meanwhile, microstructure study using scanning electron microscopy (SEM) illustrated that La substitution by another rare earth element caused a reduction in grain size. This might due to the changes in enthalpy of fusion by other rare earth ions, where higher enthalpy of fusion favours formation of smaller grain size. However, CeMnO3 did not form under this preparation condition. The magnetic properties studied from the hysteresis plot taken at room temperature indicated that the substitution of La with other magnetic trivalent rare earth ions strongly weakened the magnetic strength of the system. |
| first_indexed | 2024-03-06T08:47:04Z |
| format | Article |
| id | upm.eprints-40435 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T08:47:04Z |
| publishDate | 2012 |
| publisher | Universiti Putra Malaysia Press |
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| spelling | upm.eprints-404352015-11-04T02:09:10Z http://psasir.upm.edu.my/id/eprint/40435/ Effect of rare earth elements substitution in La site for LaMnO3 Manganites Wong, Jen Kuen Lim, Kean Pah Shaari, Abdul Halim Chen, Soo Kien Ng, Siau Wei Gan, Albert Han Ming With a view to understanding the effect of rare earth element (Ce, Pr, Nd, Sm and Gd) substitution for the La site in LaMnO3 (LMO), the samples were prepared via solid-state reaction. Structure investigation by X-ray diffraction (XRD) showed that structure transformation from trigonal (LMO) to orthorhombic (PMO, NMO, SMO and GMO) occurred when smaller trivalent rare earth element was replaced. The MnO6octahedra were tilted and elongated or compressed, corresponding to the ionic radii of the rare earth inserted. Meanwhile, microstructure study using scanning electron microscopy (SEM) illustrated that La substitution by another rare earth element caused a reduction in grain size. This might due to the changes in enthalpy of fusion by other rare earth ions, where higher enthalpy of fusion favours formation of smaller grain size. However, CeMnO3 did not form under this preparation condition. The magnetic properties studied from the hysteresis plot taken at room temperature indicated that the substitution of La with other magnetic trivalent rare earth ions strongly weakened the magnetic strength of the system. Universiti Putra Malaysia Press 2012 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/40435/1/6.%20Effect%20of%20rare%20earth%20elements%20substitution%20in%20la%20site%20for%20LaMnO3%20Manganites.pdf Wong, Jen Kuen and Lim, Kean Pah and Shaari, Abdul Halim and Chen, Soo Kien and Ng, Siau Wei and Gan, Albert Han Ming (2012) Effect of rare earth elements substitution in La site for LaMnO3 Manganites. Pertanika Journal of Science & Technology, 20 (1). pp. 81-88. ISSN 0128-7680; ESSN: 2231-8526 http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JST%20Vol.%2020%20%281%29%20Jan.%202012/12%20Pg%2081-88.pdf |
| spellingShingle | Wong, Jen Kuen Lim, Kean Pah Shaari, Abdul Halim Chen, Soo Kien Ng, Siau Wei Gan, Albert Han Ming Effect of rare earth elements substitution in La site for LaMnO3 Manganites |
| title | Effect of rare earth elements substitution in La site for LaMnO3 Manganites |
| title_full | Effect of rare earth elements substitution in La site for LaMnO3 Manganites |
| title_fullStr | Effect of rare earth elements substitution in La site for LaMnO3 Manganites |
| title_full_unstemmed | Effect of rare earth elements substitution in La site for LaMnO3 Manganites |
| title_short | Effect of rare earth elements substitution in La site for LaMnO3 Manganites |
| title_sort | effect of rare earth elements substitution in la site for lamno3 manganites |
| url | http://psasir.upm.edu.my/id/eprint/40435/1/6.%20Effect%20of%20rare%20earth%20elements%20substitution%20in%20la%20site%20for%20LaMnO3%20Manganites.pdf |
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