Magnetic field studies of superconductingUBe13thin films

We have made superconducting thin films of ${\mathrm{UBe}}_{13}$ by vapor codeposition onto heated sapphire substrates. The critical magnetic field and normal-state magnetoresistance of the films are similar to those of bulk material. The magnetoresistance has been measured in the temperature range 0.4 to 40 K in fields up to 20 T. We find that plots of isotherms of the magnetoresistance [R(0)-R(H)]/R(0) versus magnetic field H show a universal behavior for T>2 K if the scale of the magnetic field is compressed as T increases.