  We explore the three-particle spin model of an $S_{1}=\frac{1}{2}$ particle
(e.g. a stationary electron) interacting with two spin-coupled $S_{\text{2,3}}$
particles with exchange coupling and magnetic anisotropy. We find that in the
case of $S_{2,3}=1$ particles, the coupled particle entanglement states can be
prepared, controlled, and read by the $S_{1}$ particle. We also find that for
particular resonance conditions of the magnetic anisotropy strength $D$ and
exchange coupling strength $J$, the entanglement state switching behavior is
maximized and is robust against a range of anisotropic application of the
exchange coupling.
