Epitaxial γ′-Fe4N films with different thicknesses were fabricated on Pb(Mg1/3Nb2/3)0.7Ti0.3O3 (PMN-PT) substrates by facing-target reactive sputtering. The magnetoelectric coupling (MEC) in the samples was systematically investigated. Firstly, the magnetization along different in-plane directions is tunable by the electric field. It was found that MEC in the films on PMN-PT(011) is stronger than that on PMN-PT(001) due to the different in-plane magnetic anisotropy. Moreover, the magnetoelectric coupling is strongly related to the γ′-Fe4N film thickness, which can be ascribed to the competition between the strain and spin-dependent screening effect induced MEC. Additionally, the electric-field tailored remanent magnetization of the samples gradually increases with temperature due to the thermal agitation. Besides, the electric-field effect on the out-of-plane magnetic hysteresis loops is consistent with the in-plane cases. The results are of benefit to the development of the electric-field controlled spintronic devices.
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21 September 2019
Research Article|
September 17 2019
Magnetoelectric coupling in γ′-Fe4N/Pb(Mg1/3Nb2/3)0.7Ti0.3O3 multiferroic heterostructures Available to Purchase
Zhengxun Lai;
Zhengxun Lai
1
Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, School of Science, Tianjin University
, Tianjin 300354, China
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Peng Li
;
Peng Li
2
PSE Division, King Abdullah University of Science and Technology (KAUST)
, Thuwal 23955-6900, Kingdom of Saudi Arabia
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Wenbo Mi
Wenbo Mi
a)
1
Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, School of Science, Tianjin University
, Tianjin 300354, China
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
Zhengxun Lai
1
Peng Li
2
Wenbo Mi
1,a)
1
Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, School of Science, Tianjin University
, Tianjin 300354, China
2
PSE Division, King Abdullah University of Science and Technology (KAUST)
, Thuwal 23955-6900, Kingdom of Saudi Arabia
a)Author to whom correspondence should be addressed: [email protected]
J. Appl. Phys. 126, 113901 (2019)
Article history
Received:
July 07 2019
Accepted:
August 28 2019
Citation
Zhengxun Lai, Peng Li, Wenbo Mi; Magnetoelectric coupling in γ′-Fe4N/Pb(Mg1/3Nb2/3)0.7Ti0.3O3 multiferroic heterostructures. J. Appl. Phys. 21 September 2019; 126 (11): 113901. https://doi.org/10.1063/1.5119002
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