Inductance and domain configuration of write heads

Domain control of write head yokes is important for high frequency applications. The ideal configuration is one that enables magnetic flux propagation through magnetization rotation rather than wall motion. In this paper, we systematically studied the effects of stress on domain configuration of a write head with a plated NI45FE55 top yoke. The domain configurations were correlated with the inductance date. It was found that applying tensile stress along the yoke width direction change the domain configuration from "axial" to "edge-closure" and improves the inductance rolloff of the write head significantly.