NMR Studies of Field Induced Magnetism in CeCoIn$_5$

TL;DR

This paper investigates the magnetic structure of CeCoIn5 in high magnetic fields using NMR and neutron scattering, revealing static incommensurate magnetism and analyzing hyperfine interactions.

Contribution

It provides a detailed analysis of NMR data assuming anisotropic hyperfine coupling, supporting a specific magnetic ordering in CeCoIn5.

Findings

Evidence of static incommensurate magnetism in CeCoIn5's B phase

Ordered Ce moments aligned along the [001] direction

NMR spectra consistent with certain magnetic structures

Abstract

Recent Nuclear Magnetic Resonance and elastic neutron scattering experiments have revealed conclusively the presence of static incommensurate magnetism in the field-induced B phase of CeCoIn5. We analyze the NMR data assuming the hyperfine coupling to the In(2) nuclei is anisotropic and simulate the spectra for several different magnetic structures. The NMR data are consistent with ordered Ce moments along the [001] direction, but are relatively insensitive to the direction of the incommensurate wavevector.