Eur. Phys. J. B (2015) 88: 141
https://doi.org/10.1140/epjb/e2015-50872-4

Regular Article

Sr₂IrO₄ magnetic phase diagram from resistivity

¹ Laboratoire de Physique des Solides, C.N.R.S. UMR 8502, Université Paris-Sud, 91405 Orsay, France
² Service de Physique de l’Etat Condensé, CEA-Saclay, 91191 Gif-sur-Yvette, France

^a e-mail: fruchter@lps.u-psud.fr

Received: 19 December 2014
Received in final form: 11 March 2015
Published online: 1 June 2015

Abstract

We show that, contrary to previous belief, the transition to the antiferromagnetic state of Sr₂IrO₄ in zero magnetic field does show up in the transverse resistivity. We attribute this to a change in transverse integrals associated to the magnetic ordering, which is evaluated considering hopping of the localized charge. The evolution of the resistivity anomaly associated to the magnetic transition under applied magnetic field is studied. It tracks the magnetic phase diagram, allowing to identify three different lines, notably the spin-flip line, associated with the reordering of the ferromagnetic component of the magnetization, and an intriguing line for field induced magnetism, also corroborated by magnetization measurements.