MAGNETIC AND RELATED PROPERTIES OF GDCU5.1IN6.9

Magnetic measurements performed between 1.7 and 300 K show that GdCu5. 1In6.9 is an antiferromagnet below T-N = 13.4(1) K, At temperatures 17 - 300 K the Curie-Weiss law is followed with p(eff) = 7.57 mu(B) and theta = -33.8 K. Electrical resistivity measurements do not show any p ronounced anomaly, but the resistivity is rather low with RRR approxim ate to 59. The EPR experiment shows that the resonance exists between 10 and 300 K. A temperature independent g-shift (Delta g = -0.036(10)) and a Korringa-type linewidth broadening of 2.6 G/K was observed at t emperatures higher than 55 K. The linewith increase found at high temp erature well above T-N can suggest a significant amount of short-range order. Gd-155 Mossbauer effect examinations show that H-hf is perpend icular to the c-axis and therefore magnetic moments of Gd are located within the ab-plane.