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Phase transitions, compensation phenomenon and magnetization of aferro-ferrimagnetic ternary alloy AB$_{\rho}$C$_{1-\rho}$ composed of threedifferent kinds of magnetic ions A, B and C with the spin magnitude 1/2, 1 and3/2 are examined within the framework of a mixed-spin Ising model on ahoneycomb lattice with a selective annealed site disorder on one of its twosublattices. It is supposed that the first sublattice of a bipartite honeycomblattice is formed by the spin-1/2 magnetic ions, while the sites of the secondsublattice are randomly occupied either by the spin-1 magnetic ions with aprobability $\rho$ or the spin-3/2 magnetic ions with a probability $1-\rho$,both being subject to a uniaxial single-ion anisotropy. The model underinvestigation can be exactly mapped into an effective spin-1/2 Ising model on atriangular lattice through the generalized star-triangle transformation. For aspecific concentration of the spin-1 (spin-3/2) magnetic ions, it is shown thatthe ferro-ferrimagnetic version of the studied model may display a compensationtemperature at which the total magnetization vanishes below a criticaltemperature. The critical temperature strikingly may also become independent ofthe concentration of the randomly mixed spin-1 and spin-3/2 magnetic ions for aspecific value of a uniaxial single-ion anisotropy. The spontaneous magneticorder may be notably restored at finite temperatures through theorder-by-disorder mechanism above a disordered ground state, which results inan anomalous temperature dependence of the total magnetization with doublereentrant phase transitions.

physical review. e

Magnetic behavior of a ferro-ferrimagnetic ternary alloy  AB$_\rho$C$_{1-\rho}$ with a selective site disorder: the case study of a  mixed-spin Ising model on a honeycomb lattice