A head for use in a drive includes a heating element capable of generating
heat sufficient to cause the head to have a shape that is similar or
identical to the shape that the head has when performing an operation
(e.g. writing) on a recording medium in the drive. The heating element is
activated when the operation is not being performed. Hence, a head
generates the same amount (or similar amount) of heat and is therefore at
the same temperature (also called "operating temperature"), regardless of
whether or not an operation (such as writing) is being performed.
Therefore, the head maintains a fixed shape or has a shape that varies
minimally, within a predetermined range around the fixed shape, that in
turn results in maintaining fly height (distance between the head and the
recording medium). The heating element may be implemented to use loss
mechanisms inherent in a write transducer, e.g. by providing a center tap
to the write transducer. When using a center tapped write transducer,
currents in phase with one another are provided to perform a write
operation. When not performing the write operation, the same currents are
provided, but out of phase.