%0 Journal Article %A Ballesteros, H. G. %A Fernández Pérez, Luis Antonio %A Martín Mayor, Víctor %A Muñoz Sudupe, Antonio %T Monte Carlo study of O(3) antiferromagnetic models in three dimensions %D 1996 %@ 0163-1829 %U https://hdl.handle.net/20.500.14352/60103 %X We study three antiferromagnetic formulations of the O(3) spin model in three dimensions by means of Monte Carlo simulations: (1) a two parameter s model with nearest- and next-nearest neighbors couplings in a cubic lattice; (2) a face-centered-cubic lattice with nearest-neighbor interaction; (3) a cubic lattice with a set of fully frustrating couplings. We discuss in all cases the vacua properties and analyze the phase transitions. Using finite-size scaling analysis we conclude that all phase transitions found are of first order. %~