@article {Sawicki2012, title = {Origin of low-temperature magnetic ordering in Ga 1-xMn xN}, journal = {Physical Review B - Condensed Matter and Materials Physics}, volume = {85}, number = {20}, year = {2012}, note = {cited By 42}, pages = {205204}, abstract = {By using highly sensitive millikelvin superconducting quantum interference device magnetometry, the magnitude of the Curie temperature as a function of the Mn concentration x is determined for thoroughly characterized Ga1-xMnxN. The interpretation of the results in the frame of tight-binding theory and of Monte Carlo simulations allows us to assign the spin interaction to ferromagnetic superexchange and to point out the limited accuracy of state-of-the-art ab initio methods in predicting the magnetic characteristics of dilute magnetic insulators.}, doi = {10.1103/PhysRevB.85.205204}, url = {https://journals.aps.org/prb/abstract/10.1103/PhysRevB.85.205204}, author = {Sawicki, M. and Devillers, T. and Ga{\l}ȩski, S. and Simserides, C. and Dobkowska, S. and Faina, B. and Grois, A. and Navarro-Quezada, A. and Trohidou, K.N. and Majewski, J.A. and Dietl, T. and Bonanni, A.} }