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標題: Flexible Heteroepitaxy of CoFe2O4/Muscovite Bimorph with Large Magnetostriction
作者: Liu, Heng-Jui
Wang, Chih-Kuo
Su, Dong
Amrillah, Tahta
Hsieh, Ying-Hui
Wu, Kun-Hong
Chen, Yi-Chun
Juang, Jenh-Yih
Eng, Lukas M
Jen, Shien-Uang
Chu, Ying-Hao
關鍵字: cobalt ferrite (CoFe2O4)
flexible magnetic devices
muscovite (mica)
van der Waals epitaxy
摘要: A bimorph composed of ferrimagnetic cobalt ferrite (CoFe2O4, CFO) and flexible muscovite was fabricated via van der Waals epitaxy. The combination of X-ray diffraction and transmission electron microscopy was conducted to reveal the heteroepitaxy of the CFO/muscovite system. The robust magnetic behaviors against mechanical bending were characterized by hysteresis measurements and magnetic force microscopy, which maintain a saturation magnetization (Ms) of ∼120-150 emu/cm3 under different bending states. The large magnetostrictive response of the CFO film was then determined by digital holographic microscopy, where the difference of magnetostrction coefficient (Δλ) is -104 ppm. The superior performance of this bimorph is attributed to the nature of weak interaction between film and substrate. Such a flexible CFO/muscovite bimorph provides a new platform to develop next-generation flexible magnetic devices.
Appears in Collections:材料科學與工程學系



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