1 research outputs found
Flexible Heteroepitaxy of CoFe<sub>2</sub>O<sub>4</sub>/Muscovite Bimorph with Large Magnetostriction
A bimorph
composed of ferrimagnetic cobalt ferrite (CoFe<sub>2</sub>O<sub>4</sub>, 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 (<i>M</i><sub>s</sub>) of ∼120–150
emu/cm<sup>3</sup> 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