光具有高速性、多重性和可控性等许多特点，所以作为信息传递方式有其诸多优越性，光通信、光电脑等在下一世纪的尖端技术中占据着重要地位。从这一观点来看，可用光控制磁性的材料，即光磁性材料具有重要意义。这里概要地介绍了三个光磁性材料。一是普鲁士蓝类金属络合物：可 Light has many characteristics such as high speed, multiplicity and controllability, so it has many advantages as the way of information transmission. Optical communication, optical computer and so on occupy an important position in the advanced technology of the next century. From this point of view, it is of great importance to use a light-controllable magnetic material, namely a magneto-optical material. Three photomagnetic materials are briefly described here. First, Prussian blue metal complexes: Yes