Sr2IrO4 magnetic phase diagram from resistivity Luc Fruchter, Gaston Collin, Dorothée Colson and Véronique Brouet Eur. Phys. J. B, 88 6 (2015) 141 Published online: 01 June 2015 DOI: 10.1140/epjb/e2015-50872-4