【摘要】 通过室温和 35 0℃注 Mn后热退火 ,在 Ga As/ Al Ga As超晶格中引入了不同的亚微米磁性颗粒 .利用原子力显微镜、能量散射 X射线谱、X射线衍射和交变梯度磁强计研究了该颗粒膜材料的结构和磁学性质 .通过比较这些颗粒的饱和磁化强度、剩余磁化强度、矫顽力和剩磁比 ,发现 35 0℃注 Mn的样品含有 Mn Ga和 Mn As两种磁性颗粒 ,而室温注 Mn的样品主要含有 Mn As颗粒更多还原

【Abstract】 Different submicron ferromagnets are fabricated into GaAs/AlGaAs superlattice t hrough ion implantation at room temperature and 350℃ followed by subsequent the rmal annealing.The structural and magnetic properties of the granular film are studied by atomic force microscope,energy dispersion X-ray spectrum,X-ray diff raction,and alternating gradient magnetometer.By comparing their saturation mag netization,remanence magnetization,coercivity,and remanence ratio,it is confirme d that the MnGa and MnAs precipitates are formed in the 350℃ implanted samples whereas only MnAs precipitates are formed in the samples implanted at room temp erature.更多还原