Thermal Control Layer Research Articles

Experimental Examination of an Overwrite Method Utilizing Leakage Field Modulation by the Laser Power Level

A recently proposed novel single beam overwrite method was examined in order to prove the overwrite concept. The storage layer, the thermal control layer, the biasing layer, and the initializing layer were stacked on a glass substrate and were examined by a magneto-optical read/write tester. It was clear that the leakage field from the biasing layer was modulated by the laser power level and that an overwritable operating region was obtained by this leakage field modulation. The operating margin increased by increasing the linear velocity of the disk. An overwrite CNR of 35 dB was obtained in velocities above 8 m/s with a 20% completely erasing power margin.