| 摘要 |
PURPOSE:To obtain a magnetic field detecting element which is suitable for high-density recording and reproduction by forming extremely thin magnetic wires at specific intervals and by placing non-magnetic layers between the magnetic wires. CONSTITUTION:Magnetic wires 2 made of Co, Fe, Ni and an alloy of these are formed in very small dimensions, 0.5-100nm wide (d), 1-100nm thick (t) and 1-10,000nm long (1). The magnetic wire 2 are located in a plane with non- magnetic layers 3 made of Cu, V, Ru and Cr put between. The width D of the non-magnetic layer 3 is so set at 0.5-100nm as to generate antiferromagnetic bonding between the magnetic fine lines and the non-magnetic layers. By this method, a magnetic field detecting element can be obtained which is very small in size but which is very much suitable for high-density recording and reproduction and has such a characteristic that an electric resistance may change effectively to an outside magnetic field. With this element, a high-density magnetic reproducing system and a very small magnetism observation equipment can be obtained. |
