A reader formed in a data transducer includes a first shield, a read gap,
a second shield, a maanetic compensation layer, and a non-magnetic spacer
layer. The first shield is formed of a multilayer comprised of a layer of
a first material. The second shield is spaced apart from the first shield
by the read gap. The magnetic compensation layer is formed in the first
shield and has a coefficient of thermal expansion of less than the
coefficient of thermal expansion of the first material. The non-magnetic
spacer layer separates the first material layer and the compensation
layer of the first shield.