A random binary mixture of Ising magnets with two spin lengths belongs to the 3D site-diluted Ising universality class, with spin-length ratio and concentration tuning the size of scaling corrections.
New Universality Class in three dimensions: the Antiferromagnetic $RP^2$ model
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abstract
We present the results of a Monte Carlo simulation of the $RP^2$ model in three dimensions with negative coupling. We observe a second order phase transition between the disordered phase and an antiferromagnetic, unfrustrated, ordered one. We measure, with a Finite Size Scaling analysis, the thermal exponent, obtaining $\nu=0.784(8)$. We have found two magnetic-type relevant operators whose related $\eta$ exponents are $0.038(2)$ and $1.338(8)$ respectively.
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Emergence of the 3D diluted Ising model universality class in a mixture of two magnets
A random binary mixture of Ising magnets with two spin lengths belongs to the 3D site-diluted Ising universality class, with spin-length ratio and concentration tuning the size of scaling corrections.