Magnetoresistance and the Fermi surface of the intermetallic compound LaIn3

Abstract
To investigate topological properties of the Fermi surface of the intermetallic compound LaIn3, which attracts interest because of its magnetic and superconducting properties, the transverse magnetoresistance has been measured on the single-crystal samples at 4.2 K in magnetic fields up to 17.5 T. The experiment indicates the possibility that there may exist an open sheet of the Fermi surface which supports open orbits in the (110) direction on the (110) plane. The APW energy band-structure calculation predicts that LaIn3 may have a multiply connected open Fermi surface, whose topology is consistent with the experimental results.