High-field irreversible moment reorientation in the antiferromagnet Fe1.1Te

William Knafo (1) , Romain Viennois (2, 3) , Géraldine Ballon (1) , Xavier Fabrèges (1) , Fabienne Duc (1) , Carsten Detlefs (4) , Jean Léotin (1) , Enrico Giannini (2)

1 LNCMI-T - Laboratoire national des champs magnétiques intenses - Toulouse
2 DPMC - Département de Physique de la Matière Condensée
3 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
4 ESRF - European Synchrotron Radiation Facility

Magnetization measurements have been performed on single-crystalline Fe1.1Te in pulsed magnetic fields H⊥c up to 53 T and at temperatures from 4.2 to 65 K. At T=4.2 K, a nonreversible reorientation of the antiferromagnetic moments is observed at μ0HR=48 T as the pulsed field is on the rise. No anomaly is observed at HR during the fall of the field and, as long as the temperature is unchanged, during both rises and falls of additional field pulses. The transition at HR is reactivated if the sample is warmed up above the Néel temperature TN≃60 K and cooled down again. The magnetic field-temperature phase diagram of Fe1.1Te in H⊥c is also investigated. We present the temperature dependence of HR, as well as that of the antiferromagnetic-to-paramagnetic borderline Hc in temperatures above 40 K.

Domaines: Electrons fortement corrélés [cond-mat.str-el]; Supraconductivité [cond-mat.supr-con]

William Knafo, Romain Viennois, Géraldine Ballon, Xavier Fabrèges, Fabienne Duc, et al.. High-field irreversible moment reorientation in the antiferromagnet Fe1.1Te. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 87, pp.020404(R). ⟨10.1103/PhysRevB.87.020404⟩. ⟨hal-00776120⟩