Glen Adam Garfunkel

Dependence of magnetoresistive head readback characteristics on sensor height

The microtrack profile and bias point of a magnetoresistive (MR) head play a fundamental role in determining the full track response. In this paper the stripe height dependence of these properties is studied. The magnetic center of the MR head is found to approach the physical center, and microtrack side slopes become steeper and more equal as the stripe height is decreased. These experimentally observed trends can be understood using a simple model based on anisotropic flux propagation in the MR sensor.

Write bubble and field rise time measurements

An experimental technique has been developed for studying the write bubble created by the thin film recording heads. From the measurements of the write bubble size, we can estimate the write field magnitude and the write field gradient at the write bubble boundaries. Using the same experimental setup, we can also study the write field high frequency characteristics.