Nucleation-Induced Self-Assembly of Multiferroic BiFeO3-CoFe2O4 Nanocomposites

作者：Stratulat, Sergiu M.; Lu, Xiaoli; Morelli, Alessio; Hesse, Dietrich; Erfurth, Wilfried; Alexe, Marin^*

来源：Nano Letters, 2013, 13(8): 3884-3889.

DOI：10.1021/nl401965z

• Multiferroic
• heterostructures
• magnetoelectric coupling
• self-assembly

Large areas of perfectly ordered magnetic CoFe2O4 nanopillars embedded in a ferroelectric BiFeO3 matrix were successfully fabricated via a novel nucleation-induced self-assembly process. The nucleation centers of the magnetic pillars are induced before the growth of the composite structure using anodic aluminum oxide (AAO) and lithography-defined gold membranes as hard mask. High structural quality and good functional properties were obtained. Magneto-capacitance data revealed extremely low losses and magneto-electric coupling of about 0.9 mu C/cmOe. The present fabrication process might be relevant for inducing ordering in systems based on phase separation, as the nucleation and growth is a rather general feature of these systems.

• 出版日期2013-8
• 单位西安电子科技大学