Open AccessSuper‐Flexible Freestanding BiMnO 3 Membranes with Stable Ferroelectricity and Ferromagnetism
Author(s) -
Jin Cai,
Zhu Yuanmin,
Li Xiaowen,
An Feng,
Han Wenqiao,
Liu Qi,
Hu Sixia,
Ji Yanjiang,
Xu Zedong,
Hu Songbai,
Ye Mao,
Zhong Gaokuo,
Gu Meng,
Chen Lang
Publication year - 2021
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202102178
Subject(s) - ferroelectricity , membrane , materials science , piezoresponse force microscopy , ferromagnetism , bend radius , piezoelectricity , bending , flexible electronics , multiferroics , nanotechnology , composite material , optoelectronics , condensed matter physics , chemistry , physics , biochemistry , dielectric
Multiferroic materials with flexibility are expected to make great contributions to flexible electronic applications, such as sensors, memories, and wearable devices. In this work, super‐flexible freestanding BiMnO 3 membranes with simultaneous ferroelectricity and ferromagnetism are synthesized using water‐soluble Sr 3 Al 2 O 6 as the sacrificial buffer layer. The super‐flexibility of BiMnO 3 membranes is demonstrated by undergoing an ≈180° folding during an in situ bending test, which is consistent with the results of first‐principles calculations. The piezoelectric signal under a bending radius of ≈500 µm confirms the stable existence of electric polarization in freestanding BiMnO 3 membranes. Moreover, the stable ferromagnetism of freestanding BiMnO 3 membranes is demonstrated after 100 times bending cycles with a bending radius of ≈2 mm. 5.1% uniaxial tensile strain is achieved in freestanding BiMnO 3 membranes, and the piezoresponse force microscopy (PFM) phase retention behaviors confirm that the ferroelectricity of membranes can survive stably up to the strain of 1.7%. These super‐flexible membranes with stable ferroelectricity and ferromagnetism pave ways to the realizations of multifunctional flexible electronics.