High-field irreversible moment reorientation in the antiferromagnet Fe${}_{1.1}$Te

Abstract

Magnetization measurements have been performed on single-crystalline Fe${}_{1.1}$Te in pulsed magnetic fields $\mathbf{H}\perp \mathbf{c}$ up to 53 T and temperatures from 4.2 to 65 K. At $T=4.2$ K, a non-reversible reorientation of the antiferromagnetic moments is observed at ${\mu }_0{H}_R=48$ T as the pulsed field is on the rise. No anomaly is observed at $H_R$ 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 $H_R$ is reactivated if the sample is warmed up above the Néel temperature $T_N\simeq 60$ K and cooled down again. The magnetic field-temperature phase diagram of Fe${}_{1.1}$Te in $\mathbf{H}\perp \mathbf{c}$ is also investigated. We present the temperature dependence of $H_R$, as well as that of the antiferromagnetic-to-paramagnetic borderline $H_c$ in temperatures above 40 K.

arXiv comment5 pages, 4 figures

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