Bi₂WO₆:CoFe₂O₄ (BWO:CFO) vertically aligned nanocomposite (VAN) in epitaxial thin film form has been demonstrated on single-crystal LaAlO₃ (LAO) (001) substrates via pulsed laser deposition (PLD). CFO nanopillars exhibit a unique nanocone shape embedded in the epitaxial BWO matrix with an Aurivillius layered oxide structure. The growth direction of the CFO nanopillars is (004), different from that of its epitaxial single-phase counterpart (220), which is attributed to the interfacial strain effect. Magnetic measurements show robust and anisotropic magnetic properties from the CFO nanocone structures, and obvious ferroelectric responses are demonstrated in the BWO matrix, both at room temperature.

已通过脉冲激光沉积（PLD）在单晶LaAlO ₃（LAO）（001）衬底上证明了外延薄膜形式的Bi ₂ WO ₆：CoFe ₂ O ₄（BWO：CFO）垂直排列的纳米复合材料（VAN ）。CFO纳米柱表现出独特的纳米锥形状，该形状嵌入具有Aurivillius分层氧化物结构的外延BWO基质中。CFO纳米柱的生长方向是（004），不同于其外延单相对应物（220）的生长方向，这归因于界面应变效应。磁性测量表明，CFO纳米锥结构具有强大的各向异性磁性，并且在室温下，在BWO基体中均表现出明显的铁电响应。