A brief introduction to semiconductor spintronics that includes magnetic semiconductor , magnetic / semiconductor compound structures , spin phenomena in the non - magnetic semiconductor quantum well and nanostructures , and spin injection into semiconductor etc . is given 摘要简单介绍了半导体自旋电子学的研究对象和内容，主要包括磁性半导体、磁性半导体复合结构、非磁性半导体量子阱和纳米结构中的自旋现象，以及半导体的自旋注入等。
The effect of the mean field part is similar to that of non - magnetic impurities while the many - particle effect decreases rapidly as temperature increases . from an analytic treatment , connection between the kondo resonance induced by the magnetic impurity and the nanotube parameter is discussed 根据微扰展开的思想,磁性杂质的影响分为平均场效应部分和多粒子效应部分,计算表明前者的作用与非磁性杂质相似,后者的影响随着温度升高急剧减小。
A novel method of electrostatic suspension was developed . this article briefly discusses the basic concept , schematic setup and optronic feedback system of the electrostatic suspension . when taking an aluminum plate and a compact disc ( cd ) as the suspended objects respectively , it is measured the electrostatic forces acting on the objects under different electrode voltages and different electrode - object gaps . the experimental results show that the electrostatic forces are sufficient to levitate both of the suspended objects , namely the electrostatic suspension method is practically feasible . compared to the conventional magnetic suspension , the significant characteristic of the electrostatic suspension is that it is capable of suspending most of the conductive and / or nonconductive , magnetic and / or nonmagnetic objects . therefore , this method can be widely applied to realize the electrostatic suspension and non - contact manipulation of the precision objects 本文提出光电反馈式静电悬浮的新方法，简要讨论静电悬浮的原理、装置及其光电反馈控制过程.采用铝片和cd光盘作为悬浮体，测定了不同静电电压和不同悬浮间距时的静电悬浮力，揭示了它们之间的相互关系.结果显示这两种悬浮体均可获得足够的静电悬浮力，证明了静电悬浮的可行性.静电悬浮方法的显著特点是既适用于导电体与非导电体的悬浮，又适用于磁性体与非磁性体的悬浮，克服了传统磁悬浮技术仅适用于磁性体的局限性，可广泛应用于精密元器件的悬浮与非接触无损操作
This paper has first summarized the experiment of granular film and theoretical research progress and the present major problem to be solved , has discussed the purpose meaning of this paper on this foundation , has introduced us soon afterwards with magnetic metal - non - magnetic metal material adopt for studying object to co - vapored deposited system such as the fexcu1 - x of different fe content x granular film sample , carrying out annealing handling for some of samples , using x ray diffraction instrument xrd ) , , scanning electrical microscopic ( sem ) , vibrating sample magnetometer ( vsm ) the tiny structure for sample , appearance and the magnetic result that can carry out detection 本文首先综述了颗粒膜的实验和理论研究进展情况和目前待解决的主要问题，在此基础上论述了本文的目的意义，随后介绍了我们以磁性金属?非磁性金属材料为研究对象，采用共蒸发法制备不同fe含量x的fe _ xcu _ ( 1 - x ) ，颗粒膜样品，对部分样品进行退火处理。给出了用x射线衍射仪( xrd ) 、扫描电镜( sem ) 、振动样品磁强计( vsm )对样品的微结构、形貌及磁性能进行检测的结果。
The gmr effect has became a international researching hotspot after the discovery of gmr effect of fe / cr multilayers . people found that multilayers formed by ferromagnetic metal of transition family and nonmagnetic metal or by alloy film and nonmagnetic metal will take on gmr effect . the value of gmr of co / cu multilayers is the biggest which can reach 65 % under room temperature 继fe / cr多层膜巨磁电阻效应发现以后，巨磁电阻效应已成为国际研究的热点，人们发现过渡族铁磁金属或合金薄膜与非磁性金属构成多层膜后均可呈现巨磁电阻效应，其中以co / cu多层膜的gmr值最高，室温巨磁电阻效应可达65 % 。
