Simultaneously enhanced ferroelectric and magnetic properties in Fe-substituted Ba4Sm2Fe Ti4-2Nb6+O30 ceramics
| Autor: | Juan Li, Jiang Sheng Hong, Xiao Qiang Liu, Yong Jun Wu, Yu Hui Huang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys Analytical chemistry chemistry.chemical_element 02 engineering and technology Dielectric Tungsten Coercivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity 0104 chemical sciences chemistry Mechanics of Materials visual_art Phase (matter) Materials Chemistry visual_art.visual_art_medium Curie temperature Multiferroics Ceramic 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 775:1199-1205 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.10.221 |
| Popis: | Ba4Sm2FexTi4-2xNb6+xO30 (x = 0, 0.5, 1, 1.5, 2) ceramics were prepared by standard solid-state reaction, and the filled tungsten bronze phase with space group P4bm was confirmed for all compositions. Systematic investigation of the Fe-substitution effects on dielectric, ferroelectric as well as magnetic properties was conducted. As the value of x increased, the Curie temperature (Tc) shifted from 562 K to 411 K, which was consistent with the DSC results. The coercive field (Ec) also decreased monotonously from 90 kV/cm (x = 0) to 20 kV/cm (x = 2), suggesting that the substitution of Fe promoted the ferroelectric domain switching. Compared with Ba4Sm2Ti4Nb6O30 (x = 0), simultaneously enhanced ferroelectric and magnetic properties were realized for x = 1, 1.5 and 2. This work is expected to provide a guide for designing new multiferroic materials. |
| Databáze: | OpenAIRE |
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