Patent ID: 7995425

Claim:
A device for reading and writing on magnetic media having high coercivity and high anisotropy comprising: a slider; a read/write head mounted in said slider; a DFH mechanism formed in said slider, adjacent to said read/write head, for controlling an operational fly height of said slider; a TAMR mechanism for transferring thermal energy to the media during write operations, said TAMR mechanism further comprising: a diode laser operating in the optical frequency range at a variety of power levels; a plasmon antenna adjacent to said read/write head; an optical waveguide for focusing optical radiation produced by said laser onto said antenna, a sufficient power level of such radiation being capable of producing a final temperature of said antenna and a transfer of thermal energy from surface plasmons in said antenna to said magnetic media; and a mechanism for heating said antenna to a predetermined temperature whereby said antenna is preheated to approximately 50% of said final temperature and maintained thereat, said final temperature being the temperature at which said surface plasmons are excited and whereby thermal energy is transferred to said magnetic media.