  Emergent quasiparticles that arise from the fractionalization of the
microscopic degrees of freedom have been one of the central themes in modern
condensed matter physics. The notion of magnetic monopoles, freely moving
quasiparticles fragmented from local dipole excitations, has enjoyed much
success in understanding the thermodynamic, static, and transport properties of
the so-called spin-ice materials. The artificial version of spin ice, where a
lattice of nanoscale magnetic dipoles is sculpted out of a ferromagnetic film,
provides a unique opportunity to study these unusual quasiparticles in a
material-by-design approach. Here we show that the elementary excitations in
the ice phase of a nano-magnetic array arranged in the pentagonal lattice are
composite objects comprised of the emergent monopole and a surrounding cloud of
opposite uncompensated magnetic charges.
