Multi-susceptibile single-phased ceramics with both considerable magnetic and dielectric properties by selectively doping.
Multi-susceptibile single-phased ceramics with both considerable magnetic and dielectric properties by selectively doping.
复制标题
通过选择性掺杂获得具有良好磁性能和介电性能的多磁化单相陶瓷
DOI：
10.1038/srep09498
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发表时间：
2015-04-02
影响因子：
4.6
通讯作者：
Du P
中科院分区：
文献类型：
--
作者：
Liu C;Zhang Y;Jia J;Sui Q;Ma N;Du P
具有超高磁化率共存的多铁性陶瓷对于电子器件的多功能性和集成化至关重要。然而，多铁性复合材料作为最有潜力的候选材料，将不可避免地引入界面缺陷，从而导致不同相的介电损耗。在本研究中，通过在BaFe12O19中掺杂比Fe3+更高价态的靶离子，如Ti4+、Nb5+和Zr4+，制备了具有良好磁性能和介电性能的单相铁氧体陶瓷。在电荷平衡方面，高价离子取代Fe3+产生Fe3+/Fe2+偶极子。Fe3+和Fe2+离子之间的电子跃迁导致了巨大的介电常数。而掺入靶离子的单相陶瓷由于界面极化的减弱，自然表现出较低的介电损耗，并保持了典型的磁性。这一研究为获得具有优异磁性和介电性能的实用材料提供了一种方便的方法，这可能对电子器件的集成化和多功能化感兴趣。
Multiferroic ceramics with extraordinary susceptibilities coexisting are vitally important for the multi-functionality and integration of electronic devices. However, multiferroic composites, as the most potential candidates, will introduce inevitable interface deficiencies and thus dielectric loss from dissimilar phases. In this study, single-phased ferrite ceramics with considerable magnetic and dielectric performances appearing simultaneously were fabricated by doping target ions in higher valence than that of Fe3+, such as Ti4+, Nb5+and Zr4+, into BaFe12O19. In terms of charge balance, Fe3+/Fe2+pair dipoles are produced through the substitution of Fe3+by high-valenced ions. The electron hopping between Fe3+and Fe2+ions results in colossal permittivity. Whilst the single-phased ceramics doped by target ions exhibit low dielectric loss naturally due to the diminishment of interfacial polarization and still maintain typical magnetic properties. This study provides a convenient method to attain practicable materials with both outstanding magnetic and dielectric properties, which may be of interest to integration and multi-functionality of electronic devices.
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