We present magnetic susceptibility, heat capacity, and neutron diffraction measurements of polycrystalline Nd2Ru2O7 down to 0.4 K. Three anomalies in the magnetic susceptibility measurements at 146, 21 and 1.8 K are associated with an antiferromagnetic ordering of the Ru4+ moments, a weak ferromagnetic signal attributed to a canting of the Ru4+ and Nd3+ moments, and a long-range-ordering of the Nd3+ moments, respectively. The long-range order of the Nd3+ moments was observed in all the measurements, indicating that the ground state of the compound is not a spin glass. The magnetic entropy of Rln2 accumulated up to 5 K, suggests the Nd3+ has a doublet ground state. Lattice distortions accompany the transitions, as revealed by neutron diffraction measurements, and in agreement with earlier synchrotron x-ray studies. The magnetic moment of the Nd3+ ion at 0.4 K is estimated to be 1.54(2){\mu}B and the magnetic structure is all-in all-out as determined by our neutron diffraction measurements.
@article{arxiv.1803.07363,
title = {Low temperature magnetic properties of Nd2Ru2O7},
author = {S. T. Ku and Dinesh Kumar and M. R. Lees and W-T. Lee and R. Aldus and A. Studer and P. Imperia and S. Asai and T. Masuda and S. W. Chen and J. M. Chen and L. J. Chang},
journal= {arXiv preprint arXiv:1803.07363},
year = {2018}
}