Multiferroic properties of modified BiFeO3-PbTiO3-based ceramics: Random-field induced release of latent magnetization and polarization
Multiferroic properties of modified BiFeO3-PbTiO3-based ceramics: Random-field induced release of latent magnetization and polarization
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DOI：
10.1103/physrevb.72.104434
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发表时间：
2005-09
影响因子：
3.7
通讯作者：
Naigang Wang;J. Cheng;A. Pyatakov;A. K. Zvezdin;Jiefang Li;L. Cross;D. Viehland
中科院分区：
文献类型：
--
作者：
Naigang Wang;J. Cheng;A. Pyatakov;A. K. Zvezdin;Jiefang Li;L. Cross;D. Viehland
研究发现，异价取代的$\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}\text{\ensuremath{-}}\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$基多晶材料显着增强了多铁性。相对于未修改的$\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}$，我们对修改后的$\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}\text{\ensuremath{-}}\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$基陶瓷的结果表明：（i）显着增加在电场引起的极化中； (ii) 剩余磁化强度的建立。结果证明，通过取代效应破坏了块体材料中的空间调制自旋结构，释放了锁定在摆线内的潜在磁化强度。
It has been found that aliovalent-substituted $\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}\text{\ensuremath{-}}\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$-based polycrystalline materials have significantly enhanced multiferroic properties. Relative to unmodified $\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}$, our results for modified $\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}\text{\ensuremath{-}}\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$-based ceramics reveal: (i) a dramatic increase in the electric-field-induced polarization; and (ii) the establishment of a remanent magnetization. The results evidence the destruction of a space-modulated spin structure in bulk materials, via substituent effects, releasing a latent magnetization locked within the cycloid.