Magnetoelectric effect in flexible nanocomposite films based on size-matching. Issue 7 (12th February 2021)

• Record Type: Journal Article
• Authors: Feng, Rui; Zhu, Zhengwang; Liu, Yang; Song, Shaokun; Zhang, Yang; Yuan, Ye; Han, Ting; Xiong, Chuanxi; Dong, Lijie
• Is Part Of: Nanoscale. Volume 13:Issue 7(2021)
• Page Start: 4177
• Page End: 4187
• Publication Date: 2021-02-12
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d0nr08544h
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : A size-matching approach allows large linear magnetoelectric response and good flexibility in nanocomposite films. Abstract : Flexible magnetoelectric (ME) nanocomposites with a strong coupling between ferromagnetism and ferroelectricity are of significant importance from the point of view of next-generation flexible electronic devices. However, a high loading of magnetic nanomaterials is needed to achieve preferable ME response due to the size mismatch of the magnetostrictive phase and piezoelectric phase. In this work, ultra-small CoFe2 O4 nanoparticles were prepared to match the size of the polar crystal in poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)), and 1 H, 1 H, 2 H, 2 H -perfluorooctyltriethoxysilane (POTS) is introduced to enhance the interplay between P(VDF-TrFE) and CoFe2 O4 . The above multiple effects promote a good connection between the magnetostrictive phase and the piezoelectric phase. Therefore, an effective transference of stress from CoFe2 O4 to P(VDF-TrFE) can be achieved. The as-prepared P(VDF-TrFE)/CoFe2 O4 @POTS exhibits a high ME coupling coefficient of 34 mV cm −1 Oe −1 when the content of CoFe2 O4 @POTS is 20 wt%. The low loading of fillers ensures the flexibility of ME nanocomposite films.