A magnetic transducer element is formed by rotating an integral region of
a shaft about an axis in the presence of a magnetic source. An annulus of
magnetization results in having its magnetization in the axial direction.
The exterior magnetic field emanated by the annulus exhibits respective
axial magnetic profiles of its axially and radially directed components
which have an axial shift under torque. The direction of profile shift
depends on the rotational direction of the shaft while magnetization
proceeds. A pair of regions exhibiting opposite shift directions provide
signals in which torque-dependent shift is separated from axial
displacements of the shaft. An annulus of magnetization may be
non-uniform with angle about the shaft axis. Measures to prevent eddy
currents generated in the rotting region of the shaft under magnetization
are disclosed as we "sweet spots" for sensor placement to mitigate
non-uniformity effects.