# Low temperature magnetic structure of CeRhIn$_5$ by neutron diffraction on absorption-optimized samples

## TL;DR

This study clarifies the magnetic structure of CeRhIn$_5$ at low temperatures, confirming its helical nature and measuring the ordered magnetic moment using optimized neutron diffraction techniques.

## Contribution

The paper provides the first precise measurement of the magnetic moment and confirms the helical magnetic structure of CeRhIn$_5$ using absorption-optimized neutron diffraction and polarimetry.

## Key findings

- Ordered magnetic moment of 0.54(2) μ_B
- Confirmation of helical magnetic structure
- Identification of a single chiral domain

## Abstract

Two aspects of the ambient pressure magnetic structure of heavy fermion material CeRhIn$_5$ have remained under some debate since its discovery: whether the structure is indeed an incommensurate helix or a spin density wave, and what is the precise magnitude of the ordered magnetic moment. By using a single crystal sample optimized for hot neutrons to minimize neutron absorption by Rh and In, here we report an ordered moment of $m=0.54(2)~\mu_B$. In addition, by using spherical neutron polarimetry measurements on a similar single crystal sample, we have confirmed the helical nature of the magnetic structure, and identified a single chiral domain.

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Source: https://tomesphere.com/paper/1701.05488