High magnetic and ferroelectric properties of BZT-LSM multiferroic composites at room temperature |
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Authors: | Pakpoom Jarupoom Pharatree Jaita Ratabongkot Sanjoom Chamnan Randorn Gobwute Rujijanagul |
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Affiliation: | 1. Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Lanna, Chiang Mai 50300, Thailand;2. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;3. Department of Applied Science and Biotechnology, Faculty of Agro-Industrial Technology, Rajamangala University of Technology Tawan-ok Chanthaburi Campus, Chanthaburi 22210, Thailand;4. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand |
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Abstract: | In this research, the effects of La0.7Sr0.3MnO3 additive on the phase evolution, microstructure, dielectric, ferroelectric and magnetic properties of BaZr0.07Ti0.93O3 ceramics were systematically investigated. The (BaZr0.07Ti0.93O3)/x(La0.7Sr0.3MnO3) or BZT/xLSM (where x?=?0, 5, 10 and 20?mol%) ceramics were prepared via a solid state reaction method. A pure perovskite phase is observed for the samples of x?≤?10?mol%. The M-H hysteresis loops also show an improvement in the magnetic behavior for higher LSM content samples as well as the modified ferroelectric properties. However, the 5?mol% sample exhibited the optimum ferroelectric and ferromagnetic properties with remnant magnetization (Mr) and remanent polarization (Pr) of 2.38?emu/g and 10.5?µC/cm2, respectively. The dielectric-temperature curves show that the two phase-transition temperatures as observed for the unmodified BZT ceramic merges into a single phase-transition temperature for the 5?mol% sample and then become flat curves for the 10?mol% sample. In addition, the mechanical properties i.e. Knoop hardness and Young's modulus values increase with increasing LSM content, where Knoop hardness and Young's modulus values for the 20?mol% sample are increased by ~ 45% and ~ 104%, respectively, as compared to the unmodified sample. |
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Keywords: | Sintering Dielectric properties Ferroelectric properties Magnetic properties Mechanical properties |
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