Magnetoresistivity of DyNi2B2C thin film

We present high-resolution resistivity and magnetoresistivity measurements on a DyNi2B2C thin film obtained by laser ablation. The measurements are in terpreted in the framework of the theory developed by Yamada and Takada (YT ) in the early 1970s (Yamada H., Takada S. Prog Theor Phys 1973;49:1401) fo r the magnetoresistivity of the antiferromagnetic materials and permit iden tification of the magnetic field H-c2 that destroys the magnetic ordering. So, we obtain a H-T phase diagram where the antiferromagnetic and paramagne tic states are unambiguously determined and that we compare with data in th e literature. Finally, in the paramagnetic state we have found a linear dep endence between magnetoresistivity and the square of the magnetization. (C) 1999 Elsevier Science Ltd. All rights reserved.