# Low temperature magnetic properties of Nd2Ru2O7

## TL;DR

This study investigates the low-temperature magnetic behavior of Nd2Ru2O7 using various measurements, revealing antiferromagnetic order, Nd3+ moments' long-range order, and an all-in all-out magnetic structure.

## Contribution

It provides detailed experimental insights into the magnetic ordering and structure of Nd2Ru2O7 at very low temperatures, including neutron diffraction analysis.

## Key findings

- Antiferromagnetic ordering of Ru4+ moments at 146 K
- Long-range order of Nd3+ moments observed below 1.8 K
- Magnetic structure determined as all-in all-out

## Abstract

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.

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Source: https://tomesphere.com/paper/1803.07363