Flexible Heteroepitaxy of CoFe2O4/Muscovite Bimorph with Large Magnetostriction.
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/cm3under 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.
Department of Materials Science and Engineering, National Chung Hsing University , Taichung 40227, Taiwan.
Heng-Jui
HJ
Liu
Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 30010, Taiwan.
Chih-Kuo
CK
Wang
Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States.
Dong
http://orcid.org/0000-0002-1921-6683
D
Su
Department of Electrophysics, National Chiao Tung University , Hsinchu 30010, Taiwan.
Tahta
T
Amrillah
Department of Materials Science and Engineering, National Chung Hsing University , Taichung 40227, Taiwan.|Institut für Angewandte Photophysik, Technische Universitat Dresden , Dresden 01069, Germany.
Ying-Hui
YH
Hsieh
Department of Physics, National Cheng Kung University , Tainan 701, Taiwan.
Kun-Hong
KH
Wu
Department of Physics, National Cheng Kung University , Tainan 701, Taiwan.
Yi-Chun
YC
Chen
Department of Electrophysics, National Chiao Tung University , Hsinchu 30010, Taiwan.
Jenh-Yih
JY
Juang
Institut für Angewandte Photophysik, Technische Universitat Dresden , Dresden 01069, Germany.
Lukas M
LM
Eng
Institute of Physics, Academia Sinica , Taipei 11529, Taiwan.|Institute of Optoelectronic Science, National Taiwan Ocean University , Keelung 20224, Taiwan.
Shien-Uang
SU
Jen
Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 30010, Taiwan.|Department of Electrophysics, National Chiao Tung University , Hsinchu 30010, Taiwan.|Institute of Physics, Academia Sinica , Taipei 11529, Taiwan.
Ying-Hao
http://orcid.org/0000-0002-3435-9084
YH
Chu
cobalt ferrite (CoFe2O4); flexible magnetic devices; magnetostriction; muscovite (mica); van der Waals epitaxy