本文采用脉冲激光沉积(PLD)方法在单晶Si(100)衬底上沿c轴方向生长出单晶ZnCoAlO薄膜,并通过加镀Cu层调节薄膜的光学和磁学特性.采用X射线衍射仪(XRD),光致发光光谱仪,振动样品磁强计(VSM)和霍尔效应仪对薄膜的结构、光学和磁学性能进行了研究.实验表明,样品均具有纤锌矿结构并沿(002)面择优生长.加镀Cu层之后,薄膜紫外发光得到增强,掺杂导致薄膜ZnO晶格能带间隙变宽,并使得近带边激子发光增强.同时发现,在室温下Cu离子对薄膜磁性和电子浓度产生影响,Cu掺杂可以改变薄膜中载流子浓度,并影响原有磁性的双交换机理.
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