Modulation ferromagnetism in multiferroic BiFeO3 nanocrystals via bandgap engineering

被引：9

作者：

Zhou, Hang ^{[1
]}

Luo, Xingfang ^{[1
]}

Yuan, Cailei ^{[1
]}

Hong, Aijun ^{[1
]}

He, Jun ^{[2
]}

Lei, Wen ^{[3
]}

机构：

[1] Jiangxi Normal Univ, Sch Phys Commun & Elect, Jiangxi Key Lab Nanomat & Sensors, 99 Ziyang Ave, Nanchang 330022, Jiangxi, Peoples R China

[2] Cent S Univ, Sch Phys & Elect, Hunan Key Lab Super Micro Struct & Ultrafast Proc, 932 South Lushan Rd, Changsha 410083, Hunan, Peoples R China

[3] Univ Western Australia, Sch Elect Elect & Comp Engn, 35 Stirling Highway, Crawley 6009, Australia

来源：

APPLIED PHYSICS LETTERS | 2019年 / 114卷 / 25期

基金：

中国国家自然科学基金;

关键词：

ELECTRIC-FIELD CONTROL; PHOTOCATALYTIC PROPERTIES; NANOPARTICLES; STRAIN; BEHAVIOR; SHELL; FILMS;

D O I：

10.1063/1.5093116

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页数：5

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