Flexible Heteroepitaxy of CoFe2O4/Muscovite Bimorph with Large Magnetostriction

被引：107

作者：

Liu, Heng-Jui ^{[1
]}

Wang, Chih-Kuo ^{[2
]}

Su, Dong ^{[3
]}

Amrillah, Tahta ^{[4
]}

Hsieh, Ying-Hui ^{[1
,5
]}

Wu, Kun-Hong ^{[6
]}

Chen, Yi-Chun ^{[6
]}

Juang, Jenh-Yih

Eng, Lukas M. ^{[5
]}

Jen, Shien-Uang ^{[7
,8
]}

Chu, Ying-Hao ^{[2
,4
,7
]}

机构：

[1] Natl Chung Hsing Univ, Dept Mat Sci & Engn, Taichung 40227, Taiwan

[2] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30010, Taiwan

[3] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[4] Natl Chiao Tung Univ, Depat Electrophys, Hsinchu 30010, Taiwan

[5] Tech Univ Dresden, Inst Angewandte Photophys, D-01069 Dresden, Germany

[6] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[7] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[8] Natl Taiwan Ocean Univ, Inst Optoelectron Sci, Keelung 20224, Taiwan

来源：

ACS APPLIED MATERIALS & INTERFACES | 2017年 / 9卷 / 08期

关键词：

flexible magnetic devices; cobalt ferrite (CoFe2O4); muscovite (mica); van der Waals epitaxy; magnetostriction; EPITAXIAL-GROWTH; AUXETIC BEHAVIOR; THIN-FILMS; ANISOTROPY; ORIGIN;

D O I：

10.1021/acsami.6b16485

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

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.

引用

页码：7297 / 7304

页数：8

共 41 条

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