Strain and Ferroelectric-Field Effects Co-mediated Magnetism in (011)-CoFe2O4/Pb(Mg1/3Nb2/3)0.7Ti0.3O3Multiferroic Heterostructures

Ping Wang, Chao Jin, Dongxing Zheng, Dong Li, Junlu Gong, Peng Li, Haili Bai

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19 Scopus citations


Electric-field mediated magnetism was investigated in CoFe2O4 (CFO, deposited by reactive cosputtering under different Oxygen flow rates) films fabricated on (011)-Pb(Mg1/3Nb2/3)(0.7)Ti0.3O3 (PMN-PT) substrates. Ascribed to the volatile strain effect of PMN-PT, the magnetization of the CFO films decreases along the [01-1] direction whereas it increases along the [100] direction under the electric field, which is attributed to the octahedron distortion in the spinel ferrite. Moreover, a nonvolatile mediation was obtained in the CFO film with low oxygen flow rate (4 sccm), deriving from the ferroelectric-field effect, in which the magnetization is different after removing the positive and negative fields. The cooperation of the two effects produces four different magnetization states in the CFO film with low oxygen flow rate (4 sccm), compared to the only two different states in the CFO film with high oxygen flow rate (10 sccm). It is suggested that the ferroelectric-field effect is related to the oxygen vacancies in CFO films.
Original languageEnglish (US)
Pages (from-to)24198-24204
Number of pages7
JournalACS Applied Materials & Interfaces
Issue number36
StatePublished - Aug 29 2016

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: C.J. would like to acknowledge the support of the National Natural Science Foundation of China (11304221 and 11434006) and Natural Science Foundation of Tianjin City (13JCZDJC32800).


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