Journal
APPLIED PHYSICS LETTERS
Volume 113, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5040876
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Funding
- National Basic Research Program of China [2015CB921502]
- National Science Foundation of China [51731003, 11574027, 51671019, 51471029, 61674013, 51602022, 61404125, 51501007]
- National Key R&D Program of China [2018YFB0704100]
- Beijing Municipal Science and Technology Program [Z161100002116013]
- DFG [Ja821/8-1]
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Magnetism control has a variety of applications in magnetic storage and spintronic devices. Instead of the control of direct magnetoelectric coupling via strain, voltage, and Dzyaloshinskii-Moriya interaction, the polarization-dependent coupling in multiferroic materials such as BiFeO3 is employed for the electric-field control of magnetizations in this work. A perpendicular magnetic anisotropy (PMA) has been realized in a BiFeO3/Al2O3/Pt/Co/Pt multiferroic structure at room temperature. Interestingly, a distinct change of coercivity field (similar to 400%) has been observed in the structure with opposite polarization directions, which can be attributed to the different oxidation degree at the Pt/Co interface. This spontaneous polarization-controlled switching not only provides us a platform to study the interfacial effect in multiferroic heterostructures but also paves the way to manipulate PMA or even spin orbit torque through oxygen vacancies. Published by AIP Publishing.
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