Influence of composition ratio on ferroelectric, magnetic and magnetoelectric properties of PMN–PT/CFO composite thin films
Multiferroic 0.68Pb(Mg1/3Nb2/3)O3–0.32PbTiO3/CoFe2O4 (PMN–PT/CFO) composite films have been grown on Pt/Ti/SiO2/Si substrate via sol–gel spin-coating technique. PMN–PT and CFO precursor solutions were mixed before the spin-coating process to optimize the interface interaction. We investigated the influence of the composition ratio and annealing process on the property of the multiferroic PMN–PT/CFO composite films. The films which entirely consist of PMN–PT and CFO phases have a good performance in the ferroelectric, ferromagnetic property and direct magnetoelectric coupling effect when they were annealed at 730 °C and air atmosphere. It was obviously noticed that the composition ratio between PMN–PT and CFO has an effect on the properties of PMN–PT/CFO multiferroic composites.
The authors would like to thank the financial support for this work from National Natural Science Foundation of China (Grant Nos. 51372055, 51621091, 51772126, and 21201078), Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education (Item Nos. 2015003, 2015003 and 2016010), State Key Laboratory of New Ceramic and Fine Processing of Tsinghua University (Item No. KF201505), Program for the Development of Science and Technology of Jilin Province (Item No. 20170101062JC), and the 13th Five-Year Program for Science and Technology of Education Department of Jilin Province (Item No. JJKH20170370KJ).
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