Magnetoresistance and de Haas-van Alphen Effect in the Antiferromagnetic Compound NdIn ₃

We have measured the magnetoresistance and de Haas-van Alphen (dHvA) effect in both the antiferromagnetic and paramagnetic states of NdIn3. Many dHvA branches are detected in the dHvA experiments. Among them, a nearly spherical Fermi surface in the paramagnetic state, which corresponds to a band 7-electron Fermi surface of the non-4f reference compound LaIn3, is changed in the antiferromagnetic state into a multiply connected Fermi surface with necks. The cyclotron masses of NdIn3 are in the range of 0.30m0 to 1.05m0, which are twice as large as those of LaIn3.