H. Kaya et An. Berker, Multiplicity of ordered phases in frustrated systems obtained from hard-spin mean-field theory, PHYS REV E, 62(2), 2000, pp. R1469-R1472
Random quenched dilution of the triangular-lattice antiferromagnetic Ising
model locally relieves frustration, leading to ordering phenomena. We have
studied this system, under such dilution of one sublattice, using hard-spin
mean-field theory. After a threshold dilution, two sublattices develop non
zero magnetizations of equal magnitude and opposite signs, as all three sub
lattices exhibit. spin-glass order. In this phase, multiple sets of ordered
solutions occur. A phase diagram is obtained in dilution fraction and temp
erature.