  We investigate the magnetic structures in a bilayer magnetic system with the
locally inverted interlayer coupling region using Monte Carlo simulation.
Stabilization of multiple magnetic structures including the magnetic skyrmion
is possible in the locally inverted interlayer coupling region. Various factors
such as the region area, anisotropy, interlayer coupling strength, and exchange
coupling strength affects the properties of the structures including its size
and chirality. We obtain conditions for their stabilization and for the
magnetic structural transitions. Dzyaloshinskii-Moriya interaction (DMI) and
the dipolar interaction play a prominent role as they enhance the formation and
the stability of structures significantly. An asymmetric feature can arise from
the broken inversion symmetry in the structure formation, and it gives an
interfacial DMI, which stabilizes the skyrmion. It is realized that the dipole
interaction also acts as an effective interfacial DMI in the system.
