MAGNETIC-PROPERTIES OF THE RARE-EARTH TRANSITION-METAL ANTIMONIDES LNVSB(3) AND LNCRSB(3) (LN=LA-ND, SM)

The magnetic properties of the ten title compounds were investigated w ith a SQUID magnetometer in the temperature range of 2-400 K with magn etic flux densities up to 5.5 T. The magnetic susceptibilities of the two lanthanum compounds indicate that the vanadium atoms carry a magne tic moment essentially corresponding to one uncompensated spin, and th e chromium atoms have moments, which correspond to two unpaired spins. After subtraction of these susceptibilities the other compounds show Curie-Weiss behaviour with magnetic moments corresponding to the free Ln(3+)-ion values. The vanadium compounds of Ce, Pr and Nd show magnet ic order at temperatures below 10 K. In contrast, the moments of the c hromium atoms of all compounds order ferromagnetically with Curie temp eratures varying between 105 and 125 K. In addition, the moments of th e magnetic Ln(3+) ions show order with transition temperatures between 10 and 35 K.