A method and system provide a magnetic read apparatus. The magnetic read apparatus includes a substrate and an isolation circuit. The isolation circuit includes a bias resistor and a capacitor residing on the substrate. The bias resistor and the capacitor are connected in parallel through the substrate.

An apparatus includes a slider body of a disk drive. The slider body is electrically coupled to a plurality of end bond pads. A voltage applied to one more of the end bond pads sets a surface potential of the slider body.

A Data Storage Device (DSD) comprises a magnetic disk and a slider including a writer configured to magnetically write data on the magnetic disk. A voltage is applied to the slider to provide a target offset voltage between the slider and the magnetic disk with the applied voltage differing from a disk voltage of the magnetic disk. In one aspect, a first disk voltage is determined for the magnetic disk. The voltage to be applied to the slider is determined to adjust an electric potential difference between the slider and the disk to the non-zero target offset voltage. In another aspect, the voltage applied to the slider is less than the disk voltage and reduces deterioration of the slider caused by operation of an energy-assisted magnetic recording technology at the slider while maintaining a safe fly height of the slider over the magnetic disk.