Hall Effect in GdB_{6}

Abstract

The Hall eect of GdB6 has been studied on high quality single crystals in the temperature range 2150 K and in magnetic eld of 1 T. The obtained data allow to detect anomalies in the antiferromagnetic (AF) phase including (i) a drastic enhancement of negative Hall coecient below TN1 ≈ 15.5 K and (ii) the appearance of an anomalous Hall eect at TN2 ≈ 4.7 K. Possible scenarios of the AF ground state formation are discussed.