The pinned layer structure in a self-pinned spin valve is deposited using
a DC aligning field. The deposition of each of the Reference and Keeper
layer in the pinned layer occurs within two different polarity DC
aligning fields. Thus, a first portion of the Reference layer is
deposited with a DC alignment field of a first polarity, i.e., either
positive or negative, and a second portion of the Reference layer is
deposited in a DC alignment field of opposite polarity. The Keeper layer
is similarly deposited, with a first portion of the Keeper layer
deposited in a first polarity DC alignment field and the second portion
deposited in the opposite polarity DC alignment field. By splitting the
deposition of the Reference and Keeper layers into portions using DC
aligning fields the pinned layer structure is highly repeatable while
providing a good thickness uniformity of the structure.