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目前,在高临界温度氧化超导材料的研究课题中,有一个问题尚未解决,即磁场穿过高温氧化超导材料时,磁通量具有何种性能.大多数研究此课题的科学家相信,一旦这种性能被获悉,大临界电流的获得也就相应解决.尽管许多研究部门一直试图直接观测磁通量,但尚无成功的先例.最近,日立公司推出一种新型全息电子显微镜,可用于直接观测穿通超导材料的磁力线.具体方法:把一片冷却到2.5K(-270℃)的超导薄膜置于真空磁场中,借助于这种全息电子显微镜,就可以20埃的分辨度直接观察到穿过超导膜的磁力线,并获得定量测量数据.
At present, one of the problems in the research of high temperature superconducting oxide materials has not yet been solved, that is, what kind of magnetic flux does the magnetic field have when it passes through the high temperature superconducting oxide material.Most of the scientists who study this subject believe that once this Performance has been learned, the access to large critical currents will be resolved accordingly.Although many research departments have been trying to directly observe the magnetic flux, but no successful precedent.Recently, Hitachi introduced a new type of holographic electron microscope can be used for direct observation through-the-wire Material lines of magnetic force Specific methods: A piece of superconducting film cooled to 2.5K (-270 ℃) placed in a vacuum magnetic field, with the help of this holographic electron microscope, can be 20 angstroms resolution directly observed through the superconducting Membrane flux lines, and obtain quantitative measurement data.