Structure and electrical resistivity of Gd1−xPrxCo5 compounds

The effect of partial substitution of Pr for Gd in Gd1−xPrxCo5 (x = 0, 0.1 and 0.3) on structural and resistivity properties are investigated. For GdCo5, the temperature dependence of resistivity (from 80 K to 300 K) shows a negative curvature towards the temperature axis as one goes from low to high temperatures. For samples with x = 0.1 and 0.3 composition electrical resistivity curves show anomalies at certain temperatures. It is suggested that the anomalies of the resistivity are attributed to the triggered spin reorientation transition temperature. These anomalies were also observed in the temperature dependence of ac‐susceptibility curves, which confirm the observed spin reorientation transition. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)