TY - JOUR
T1 - Using Dipole Interaction to Achieve Nonvolatile Voltage Control of Magnetism in Multiferroic Heterostructures
AU - Chen, Aitian
AU - Piao, Hong-Guang
AU - Ji, Minhui
AU - Fang, Bin
AU - Wen, Yan
AU - Ma, Yinchang
AU - Li, Peisen
AU - Zhang, Xixiang
N1 - KAUST Repository Item: Exported on 2021-10-27
Acknowledged KAUST grant number(s): CRF-2019-4081-CRG8
Acknowledgements: This work was supported by King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. CRF-2019-4081-CRG8. H.-G.P. was supported by the National Key R&D Program of China (Grant No. 2017YFB0903702). The authors acknowledge the Nanofabrication Core Lab at KAUST for their excellent assistance.
PY - 2021/10/19
Y1 - 2021/10/19
N2 - Nonvolatile electrical control of magnetism is crucial for developing energy-efficient magnetic memory. Based on strain-mediated magnetoelectric coupling, a multiferroic heterostructure containing an isolated magnet requires nonvolatile strain to achieve this control. However, the magnetization response of an interacting magnet to strain remains elusive. Herein, Co/MgO/CoFeB magnetic tunnel junctions (MTJs) exhibiting dipole interaction on ferroelectric substrates are fabricated. Remarkably, nonvolatile voltage control of the resistance in the MTJs is demonstrated, which originates from the nonvolatile magnetization rotation of an interacting CoFeB magnet driven by volatile voltage-generated strain. Conversely, for an isolated CoFeB magnet, this volatile strain induces volatile control of magnetism. These results reveal that the magnetization response to volatile strain among interacting magnets is different from that among isolated magnets. The findings highlight the role of dipole interaction in multiferroic heterostructures and can stimulate future research on nonvolatile electrical control of magnetism with additional interactions.
AB - Nonvolatile electrical control of magnetism is crucial for developing energy-efficient magnetic memory. Based on strain-mediated magnetoelectric coupling, a multiferroic heterostructure containing an isolated magnet requires nonvolatile strain to achieve this control. However, the magnetization response of an interacting magnet to strain remains elusive. Herein, Co/MgO/CoFeB magnetic tunnel junctions (MTJs) exhibiting dipole interaction on ferroelectric substrates are fabricated. Remarkably, nonvolatile voltage control of the resistance in the MTJs is demonstrated, which originates from the nonvolatile magnetization rotation of an interacting CoFeB magnet driven by volatile voltage-generated strain. Conversely, for an isolated CoFeB magnet, this volatile strain induces volatile control of magnetism. These results reveal that the magnetization response to volatile strain among interacting magnets is different from that among isolated magnets. The findings highlight the role of dipole interaction in multiferroic heterostructures and can stimulate future research on nonvolatile electrical control of magnetism with additional interactions.
UR - http://hdl.handle.net/10754/672968
UR - https://onlinelibrary.wiley.com/doi/10.1002/adma.202105902
UR - http://www.scopus.com/inward/record.url?scp=85117227350&partnerID=8YFLogxK
U2 - 10.1002/adma.202105902
DO - 10.1002/adma.202105902
M3 - Article
C2 - 34665483
SN - 0935-9648
SP - 2105902
JO - Advanced Materials
JF - Advanced Materials
ER -