  We present fractional quantum Hall domain walls confined in a gate-defined
wire structure. Our experiments utilize spatial oscillation of domain walls
driven by radio frequency electric fields to cause nuclear magnetic resonance.
The resulting spectra are discussed in terms of both large quadrupole fields
created around the wire and hyperfine fields associated with the oscillating
domain walls. This provides the experimental fact that the domain walls survive
near the confined geometry despite of potential deformation, by which a
localized magnetic resonance is allowed in electrical means.
