Magnetoresistance in a well-annealed sample of UCu<SUB>2</SUB>Ge<SUB>2</SUB>

Results are presented of magnetoresistance measurements in a well-annealed sample of UCu<SUB>2</SUB>Ge<SUB>2</SUB>. Between the as cast sample and the annealed sample, a significant difference in the low temperature behavior has been observed. A fairly large positive magnetoresistance is observed in the temperature regime below ~50 K in the annealed sample whereas earlier study on the as cast sample had shown a metamagnetic behavior at low temperatures. The measurements suggest the presence of antiferromagnetic interactions in this compound, even in the well-annealed sample, which has been otherwise characterized as a ferromagnet