  Background: The coupling of the last nucleon with configurations in the
ground state of the even-even core is known to augment the single quasiparticle
fragmentation pattern. In a recent experimental study by Yordanov \emph{et al.}
the values of the magnetic dipole and electric quadrupole moments of the
$11/2^-$ state in a long chain of Cd isotopes were found to follow a simple
trend which we try to explain by means of incorporating long-range correlations
in the ground state. Purpose: Our purpose is to study the influence of the
ground-state correlations (GSC) on the magnetic moments and compare our results
with the data for the odd-A Cd isotopes.
  Method: In order to evaluate if the additional correlations have bearing on
the magnetic moments we employ an extension to the quasiparticle-phonon model
(QPM) which takes into account quasiparticle$\otimes$phonon configurations in
the ground state of the even-even core to the structure of the odd-A nucleus
wave function.
  Results: It is shown that the values for the magnetic moments which the
applied QPM extension yields deviate further from the Schmidt values. The
latter is in agreement with the measured values for the Cd isotopes.
  Conclusions: The GSC exert significant influence on the magnetic dipole
moments and reveal a potential for reproducing the experimental values for the
studied cadmium isotopes.

Nuclear Theory