"Contact" solid immersion lens near-field optical recording in magneto-optical TbFeCo media

The solid immersion lens (SIL) near-field magneto-optical (MO) recording te chnique offers a significant increase in areal density through near-field r esolution enhancement. Since the near-field recording scheme requires close proximity of the optical recording head and the magnetic medium, the SIL M O recording setup is usually changed to a "first surface" recording. This r equires further optimization of the optical flying head design and a MO med ium. In this work marks as small as 150 nm using a SIL with a 680 nm laser source and a TbFeCo magneto-optical medium were recorded. The minimum size of a recorded mark is strongly dependent on the slider flying height, the f lying attitude, and lens centering. It should be emphasized that recording power as small as 4 mW is sufficient enough to achieve carrier-to-noise rat io of more than 30 dB. (C) 1999 American Institute of Physics. [S0021-8979( 99)38008-7].