中文摘要：

利用电子全息显微学方法，从理论和实验两方面，系统研究了磁隧道结势垒层的内势分布，指出了一些在实验过程中应予以注意的实验现象，提出了可能的解决方法．

英文摘要：

Electron holography was successfully used to investigate the distribution of the potential of the barrier in magnetic tunnelling junctions experimentally and theoretically. We got a clear profile of the potential which shows a ＂well＂ in reconstructed phase profile. We also pointed out some artefacts in electron holographic study of magnetic tunnelling junctions and suggested some possible methods to resolve them.