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Effect of Sr Substitution on Structural, Ferroelectric and Magnetic Properties of La1-xSrxFeO3 Perovskite Oxides
Paper Type  |
Contributed Paper |
Title |
Effect of Sr Substitution on Structural, Ferroelectric and Magnetic Properties of La1-xSrxFeO3 Perovskite Oxides |
Author |
Malinee Kaewpanha, Pornnipa Nunocha, Theerachai Bongkarn, Apiluck Eiad-ua and Tawat Suriwong* |
Email |
tawats@nu.ac.th |
|
Abstract: Effect of Sr substitution on structural, magnetic and electrical properties of LaFeO3 perovskite
oxides has been studied. Using the selected Sr doping content (x) from 0.0 to 1.0, perovskite La1-xSrxFeO3
nanopowder was synthesized by sol-gel auto-combustion method, followed by calcination at 900 °C for
2 h. The synthesized powder was pressed into disks at room temperature and then the disk samples were
sintered at 1200 °C for 12 h to obtain a single-phase compound formation and uniaxial compaction.
The influence of Sr doping on the phase formation, morphology, ferroelectric and magnetic properties
was investigated. The phase formation of the sample changes from orthorhombic at low Sr doping
through rhombohedral to cubic for Sr-rich sample as the stoichiometry approached SrFeO3. The grains
of La1-xSrxFeO3 ceramics revealed an irregular polyhedron shape. SEM-EDS mapping analysis also
exhibited the uniform distribution of all elements. The direct energy gap (Eg) was found to decrease
with increasing amounts of Sr doping. Moreover, the La0.6Sr0.4FeO3 ceramic exhibited ferromagnetic
behavior with saturated magnetization (Ms) of 0.305 emu/g at room temperature. |
|
Start & End Page |
642 - 653 |
Received Date |
2019-07-26 |
Revised Date |
|
Accepted Date |
2019-11-21 |
Full Text |
Download |
Keyword |
perovskites, La1-xSrxFeO3, sol-gel auto-combustion, phase formation, ferroelectric, magnetic properties |
Volume |
Vol.47 No.4 (Special Issue II : July 2020) |
DOI |
|
Citation |
Kaewpanha M., Nunocha P., Bongkarn T., Eiad-ua A. and Suriwong* T., Effect of Sr Substitution on Structural, Ferroelectric and Magnetic Properties of La1-xSrxFeO3 Perovskite Oxides, Chiang Mai Journal of Science, 2020; 47(4): 642-653. |
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