  We consider a system of Ising spins s=1/2 with nonmagnetic impurities with
charge associated with pseudospin S=1. The charge density is fixed pursuant to
the concentration n. Analysis of the thermodynamic properties in the
one-dimensional case showed the presence of so-called pseudotransitions at the
boundaries between the staggered charge ordering and (anti)ferromagnetic
ordering. In the case of n=0, a "1st order" pseudotransition was discovered.
This type of pseudotransition is inherent for a series of other one-dimensional
frustrated models. However, for n != 0 we discovered a new type of "2nd order"
pseudotransition, which had not previously been observed in other systems.
