In heat assisted magnetic recording, near field optical transducer is a key component for its success. Due to the near field
properties, the transducer design has to be done combining with media. FePt is a potential recording material for heat
assisted recording. In this paper, the measured optical constant of FePt thin film was introduced, and the design and
simulation of c-aperture transducer with FePt media for multiple Tb/in<sup>2</sup> heat assisted magnetic recording application
were performed. The light spot sizes of around 15nm with high efficiency were obtained. Optical transducer is used to
heat the media locally. Its final target is to generate smaller thermal profile to meet the requirement of recording density.
Therefore, using obtained beam spot as heat source, thermal simulations were carried out with media material's thermal
parameters. The simulation results show that recording density of 3Tb/in<sup>2</sup> is possible.