MAGNETIC PROPERTIES OF THE Dy1-xUxCo3 SYSTEM

Abstract

The magnetic properties of Dy 1-x U x Co 3 system were investigated in the 4.3–1150 K temperature range and magnetic field up to 120 kOe. The crystalline structure is rhombohedral of PuNi 3 type. For x≤0.8, the samples exhibit a ferrimagnetic behavior. The uranium substitution for dysprosium leads to the decreasing of the exchange field and the reducing of the magnetization and the transition temperatures. The Co mean moments (1.9μB/ Co for x=0) opposite to the dysprosium ones and the mean effective Co moments (3.75μB/ Co for x=0) are gradually decreasing as Dy is replaced by uranium.