Anomalous Hall Effect in Ge1-x-yPbxMnyTe Composite System

作者：Podgorni A^*; Kilanski L; Dobrowolski W; Gorska M; Domukhovski V; Brodowska B; Reszka A; Kowalski B J; Slynko V E; Slynko E I

来源：Acta Physica Polonica, A, 2014, 126(5): 1180-1183.

DOI：10.12693/aphyspola.126.1180

The purpose of this study was to investigate the magnetotransport properties of the Ge0.743Pb0.183Mn0.074Te mixed crystal. The results of magnetization measurements indicated that the compound is a spin-glass-like diluted magnetic semiconductor with critical temperature T-SG = 97.5 K. Nanoclusters in the sample are observed. Both, matrix and clusters are magnetically active. Resistivity as a function of temperature has a minimum at 30 K. Below the minimum a variable-range hopping is observed, while above the minimum a metallic-like behavior occurs. The crystal has high hole concentration, p = 6.6 x 10(20) cm(-3), temperature-independent. Magnetoresistance amplitude changes from -0.78 to 1.18% with increase of temperature. In the magnetotransport measurements we observed the anomalous Hall effect with hysteresis loops. Calculated anomalous Hall effect coefficient, R-S = 2.0 x 10(6) m(3)/C, is temperature independent. The analysis indicates the extrinsic skew scattering mechanism to be the main physical mechanism responsible for anomalous Hall effect in Ge0.743Pb0.183Mn0.074Te alloy.

• 出版日期2014-11