6533b861fe1ef96bd12c4237
RESEARCH PRODUCT
Large modulation of perpendicular magnetic anisotropy in a BiFeO3/Al2O3/Pt/Co/Pt multiferroic heterostructure via spontaneous polarizations
Gerhard JakobQuanlin LiuKangkang MengJun MiaoY. WuZedong XuYong JiangZ. Y. RenJinhao ChenXiaoguang XuP. F. Liusubject
Materials sciencePhysics and Astronomy (miscellaneous)SpintronicsCondensed matter physicsCondensed Matter::OtherMagnetismMagnetic storageHeterojunction02 engineering and technologyCoercivity021001 nanoscience & nanotechnologyPolarization (waves)01 natural scienceslaw.inventionCondensed Matter::Materials SciencelawHall effect0103 physical sciencesMultiferroics010306 general physics0210 nano-technologydescription
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 (∼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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-08-06 | Applied Physics Letters |