Abstract
A read-back magnetoresistive (MR) signal is thermally affected by an increase in the temperature of an MR sensor due to a bias current. The unstructured adaptive triangular mesh and Voronoi polygon control volume methods are adopted to solve the two-dimensional (2D) heat conduction equation for a slider. Numerical simulation results show that, for a typical femtoslider, MR resistance sharply increases with increasing bias current. In ultralow flying height (FH) magnetic recording, a slider designed with a big trailing pad, a low pitch flying attitude and a high thermal conductivity can significantly resist the MR temperature increase and enhance the heat dissipation of a slider body.