TELLURIUM-MANGANESE AMORPHOUS COMPOUND MATERIAL AND ITS PRODUCTION

摘要

PURPOSE:TeO2 and MnO2 are mixed at a specific ratio, melted with heat, then jetted onto the surface of a cooler which is rotating at a high speed to effect ultrahigh-speed cooling to produce a tellurium-manganese amorphous compound material. CONSTITUTION:TeO2 and MnO2 are fed into the tube 7 which is made of platinum and provided with an induction coil heater 5 so that x satisfies the equation: 0.70>=x>=0.50 in (TeO2)1-x(MnO2)x and melted by heating with the coil 5 at temperatures 50-200 deg.C higher than the melting point of the mixture. Then, the melt is jetted onto the cooling roller 13 which is made of high thermal conductivity material such as copper or its alloy and rotating at a peripheral speed of 5-35m/sec to effect ultrahigh speed-cooling at 10<4>-10<6> deg.C/sec cooling rate to form amorphous thin films of 10-5mum thickness. The thin films can be heated at the crystallization temperature and lower into oriented polycrystal thin films. Both of them can be used as a magnetic memory material and in other application, because of their excellent properties.