Modulation ferromagnetism in multiferroic BiFeO3 nanocrystals via bandgap engineering
Modulation ferromagnetism in multiferroic BiFeO3 nanocrystals via bandgap engineering
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DOI：
10.1063/1.5093116
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发表时间：
2019-06
影响因子：
4
通讯作者：
Hang Zhou;Xingfang Luo;C. Yuan;A. Hong;Jun He;W. Lei
中科院分区：
文献类型：
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作者：
Hang Zhou;Xingfang Luo;C. Yuan;A. Hong;Jun He;W. Lei
除了电场和电流之外，光也可以提供一种以低能耗调制铁磁性的方法。BiFeO3具有禁带宽度小、极化强度大的特点，为研究磁光调制提供了机会。在这项工作中，纯相BiFeO3纳米晶嵌入在Al2O3薄膜的合成。研究表明，BiFeO3纳米晶生长过程中产生和积累的应变可以导致原子结构的改变，从而产生应变工程带隙。BiFeO3纳米晶具有明显的光调制铁磁性。由于BiFeO3纳米晶的应变工程禁带，光照射可以更有效地调制和增强BiFeO3纳米晶的铁磁性。除了电场和电流外，光也可以提供一种低能耗的方法来调制BiFeO3纳米晶的铁磁性，这为通过带隙工程来调制BiFeO3纳米晶的铁磁性铺平了道路，在现代信息技术中具有广阔的应用前景。BiFeO3具有禁带宽度小、极化强度大的特点，为研究磁光调制提供了机会。在这项工作中，纯相BiFeO3纳米晶嵌入在Al2O3薄膜的合成。结果表明，BiFeO3纳米晶生长过程中产生和积累的应变可以导致原子结构的改变，从而产生应变工程带隙。BiFeO3纳米晶具有明显的光调制铁磁性。由于BiFeO3纳米晶的应变工程禁带，光照射可以更有效地调制和增强BiFeO3纳米晶的铁磁性。这为通过带隙工程调控BiFeO3纳米晶的铁磁性质奠定了基础，在现代信息技术中具有广阔的应用前景。
In addition to electric fields and currents, light can also provide an approach to modulate the ferromagnetism with low energy consumption. BiFeO3, with features of relatively small bandgap and large polarization, provides an opportunity for investigating the optical modulation of magnetism. In this work, pure-phase BiFeO3 nanocrystals embedded in Al2O3 films are synthesized. It is demonstrated that the strain generated and accumulated during the growth process of BiFeO3 nanocrystals can lead to the modification of the atomic structure and thus produce a strain engineered bandgap. A distinguished light-modulated ferromagnetism is observed in BiFeO3 nanocrystals. Contributed by the strain engineered bandgap, the ferromagnetism of BiFeO3 nanocrystals can be modulated and enhanced more efficiently by light irradiation. It paves the way for modulating the ferromagnetic properties of BiFeO3 nanocrystals via bandgap engineering, which has promising applications in modern information technology.In addition to electric fields and currents, light can also provide an approach to modulate the ferromagnetism with low energy consumption. BiFeO3, with features of relatively small bandgap and large polarization, provides an opportunity for investigating the optical modulation of magnetism. In this work, pure-phase BiFeO3 nanocrystals embedded in Al2O3 films are synthesized. It is demonstrated that the strain generated and accumulated during the growth process of BiFeO3 nanocrystals can lead to the modification of the atomic structure and thus produce a strain engineered bandgap. A distinguished light-modulated ferromagnetism is observed in BiFeO3 nanocrystals. Contributed by the strain engineered bandgap, the ferromagnetism of BiFeO3 nanocrystals can be modulated and enhanced more efficiently by light irradiation. It paves the way for modulating the ferromagnetic properties of BiFeO3 nanocrystals via bandgap engineering, which has promising applications in modern information technology.