@article {Stefanowicz2013, title = {Phase diagram and critical behavior of the random ferromagnet Ga1 -xMnxN}, journal = {Physical Review B - Condensed Matter and Materials Physics}, volume = {88}, number = {8}, year = {2013}, note = {cited By 42}, pages = {081201(R)}, abstract = {Molecular beam epitaxy has been employed to obtain Ga1-xMnxN films with x up to 10\% and Curie temperatures TC up to 13 K. The magnitudes of TC and their dependence on x, TC(x)xm, where m=2.2{\textpm}0.2, are quantitatively described by a tight-binding model of superexchange interactions and Monte Carlo simulations of TC. The critical behavior of this dilute magnetic insulator shows strong deviations from the magnetically clean case (x=1), in particular, (i) an apparent breakdown of the Harris criterion, (ii) a nonmonotonic crossover in the values of the susceptibility critical exponent γeff between the high temperature and critical regimes, and (iii) a smearing of the critical region, which can be explained either by the Griffiths effects or by macroscopic inhomogeneities in the spin distribution with a variance Δx=(0.2{\textpm}0.1)\%.}, doi = {10.1103/PhysRevB.88.081201}, url = {https://journals.aps.org/prb/abstract/10.1103/PhysRevB.88.081201}, author = {Stefanowicz, S. and Kunert, G. and Simserides, C. and Majewski, J.A. and Stefanowicz, W. and Kruse, C. and Figge, S. and Li, T. and Jakie{\l}a, R. and Trohidou, K.N. and Bonanni, A. and Hommel, D. and Sawicki, M. and Dietl, T.} }