Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 36, Pages 24198-24204Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b07584
Keywords
multiferroic heterostructures; CoFe2O4 films; strain; ferroelectric-field effect; oxygen vacancy
Funding
- National Natural Science Foundation of China [11304221, 11434006]
- Natural Science Foundation of Tianjin City [13JCZDJC32800]
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available