Highly Flexible and Twistable Freestanding Single Crystalline Magnetite Film with Robust Magnetism

被引：58

作者：

An, Feng ^{[1
,2
]}

Qu, Ke ^{[2
,3
]}

Zhong, Gaokuo ^{[2
]}

Dong, Yongqi ^{[2
,4
]}

Ming, Wenjie ^{[1
,2
]}

Zi, Mengfei ^{[1
,2
]}

Liu, Zhijie ^{[4
]}

Wang, Yadong ^{[5
]}

Qi, Biyun ^{[2
]}

Ding, Zhen ^{[2
]}

Xu, Jun ^{[3
]}

Luo, Zhenlin ^{[4
]}

Gao, Xingsen ^{[5
]}

Xie, Shuhong ^{[1
]}

Gao, Peng ^{[3
]}

Li, Jiangyu ^{[2
,6
]}

机构：

[1] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Peoples R China

[2] Chinese Acad Sci, Shenzhen Key Lab Nanobiomech, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China

[3] Peking Univ, Sch Phys, Electron Microscopy Lab, Beijing 100871, Peoples R China

[4] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

[5] South China Normal Univ, Inst Adv Mat, South China Acad Adv Optoelect, Guangzhou 510006, Peoples R China

[6] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2020年 / 30卷 / 31期

基金：

中国国家自然科学基金;

关键词：

flexible spintronics; freestanding films; magnetism; magnetite; ELECTRON; TRANSITION; ARRAYS;

D O I：

10.1002/adfm.202003495

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Magnetic materials and devices that can be folded and twisted without sacrificing their functional properties are highly desirable for flexible electronic applications in wearable products and implantable systems. In this work, a high-quality single crystalline freestanding Fe3O4 thin film with strong magnetism has been synthesized by pulsed laser deposition using a water-dissolvable Sr3Al2O6 sacrificial layer, and the resulting freestanding film, with magnetism confirmed at multiple length scales, is highly flexible with a bending radius as small as 7.18 mu m and twist angle as large as 122 degrees, in sharp contrast with bulk magnetite that is quite brittle. When transferred to a polydimethylsiloxane support layer, the Fe3O4 film can be bent with large deformation without affecting its magnetization, demonstrating its robust magnetism. The work thus offers a viable solution for flexible magnetic materials that can be utilized in a range of applications.

引用

页数：7

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