Patent ID: 7729087

Claim:
A magnetic head comprising: a slider body having a trailing surface meeting an air-bearing surface at a trailing edge; and a thin-film transducer disposed on the trailing surface near the trailing edge, the thin-film transducer including: a magnetoresistive (MR) element disposed near the trailing edge between upper and lower shield layers; upper and lower pole layers disposed near the trailing edge; a coil having first and second turn layers, each of the first and second turn layers being disposed between the upper and lower pole layers; and a resistive heating element, at least a portion of the heating element being disposed beneath both the lower pole layer and the coil, but above the upper shield layer; wherein current flow through the heating element causes expansion of the magnetic reproducing and recording elements at the ABS; and wherein the resistive heating element comprises a resistive material having a temperature coefficient of resistivity of about (1.5/° C.)×10 −4 or less.