Magnetic-field dependence of antiferromagnetic structure in CeRh1-xCoxIn5

TL;DR

This study explores how magnetic fields influence antiferromagnetic structures in CeRh_{1-x}Co_xIn_5, revealing different field-induced magnetic states depending on Co concentration through neutron scattering experiments.

Contribution

It provides the first detailed analysis of magnetic field effects on AF structures in CeRh_{1-x}Co_xIn_5 with varying Co content, identifying distinct field-induced AF states.

Findings

Incommensurate AF state replaced by commensurate AF state above 2 T for x=0.23.

Single q_{c1}-AF state observed above ~1.6 T for x=0.7.

Different AF correlations depend on Co concentration and magnetic field.

Abstract

We investigated effects of magnetic field H on antiferromagnetic (AF) structures in CeRh_{1-x}Co_xIn_5 by performing the elastic neutron scattering measurements. By applying H along the [1,-1,0] direction, the incommensurate AF state with the propagation vector of q_{h1}=(1/2,1/2,0.297) observed at H=0 is replaced by the commensurate AF state with the q_{c2} = (1/2, 1/2, 1/4) modulation above 2 T for x=0.23, while the AF states with the q_{c1}=(1/2,1/2,1/2) and q_{h2}=(1/2,1/2,0.42) modulations seen at H=0 change into a single q_{c1}-AF state above ~1.6 T for x=0.7. These results suggest the different types of AF correlation for Co concentrations of 0.23 and 0.7 in an applied magnetic field H.