Preferentially Oriented Nanometer-Sized CoFe2O4Mesocrystals Embedded in the BiFeO3Matrix for Opto-Magnetic Device Applications

Tahta Amrillah*, Angga Hermawan, Yugandhar Bitla, Malik Anjelh Baqiya, Le Thi Quynh, Ardiansyah Taufik, Shu Yin, Jenh Yih Juang

*此作品的通信作者

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)

摘要

CoFe2O4 (CFO) mesocrystals were synthesized in the form of collectively connected nanosized grains with specific crystallographic orientations. Such CFO mesocrystals were found to exhibit distinctive magnetic and optical properties substantially deviating from those observed in conventional CFO single crystals or in a system composed of randomly distributed nanocrystals. In this study, the magnetic and optical properties of CFO mesocrystals having the geometry of rectangular and triangular-shaped islands were extensively investigated. The magnetic strength and anisotropy behavior of rectangular CFO mesocrystals are larger than the triangular ones embedded in the BiFeO3 (BFO) matrix. The result indicates that the orientation of CFO mesocrystals and the magnetic exchange interactions at the CFO-BFO vertical interfaces are important to tune the magnetic properties of CFO mesocrystals. The strain states among the two constituent phases and the substrate also exhibited significant variations in the oxygen vacancy concentration, which in turn plays a determinate role in the optical behavior of the samples. The CFO mesocrystals embedded in rhombohedrally structured BFO matrix having Fe3+/Fe2+ ratio of 1.71 had a slightly smaller band gap than those embedded in a tetragonally structured BFO matrix with Fe3+/Fe2+ ratio of 2.52. The present study demonstrates an intriguing pathway for exploring new opportunities based on a functional CFO mesocrystal-embedded system for practical applications in opto-magnetic-related devices such as magneto-photovoltaics, memory devices, and sensors.

原文English
頁(從 - 到)11249-11259
頁數11
期刊ACS Applied Nano Materials
4
發行號10
DOIs
出版狀態Published - 22 10月 2021

指紋

深入研究「Preferentially Oriented Nanometer-Sized CoFe2O4Mesocrystals Embedded in the BiFeO3Matrix for Opto-Magnetic Device Applications」主題。共同形成了獨特的指紋。

引用此