|標題:||Flexible Heteroepitaxy of CoFe2O4/Muscovite Bimorph with Large Magnetostriction|
Eng, Lukas M.
Department of Materials Science and Engineering
Department of Electrophysics
|關鍵字:||flexible magnetic devices;cobalt ferrite (CoFe2O4);muscovite (mica);van der Waals epitaxy;magnetostriction|
|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 (M-s) of similar to 120-150 emu/cm(3) 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 (Delta lambda) 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.|
|期刊:||ACS APPLIED MATERIALS & INTERFACES|
|Appears in Collections:||Articles|