Inelastic neutron scattering shows that helimagnetic order in CrBr2 and CrI2 arises from competing antiferromagnetic intrachain and interchain nearest-neighbor exchange, with a substantial easy-axis anisotropy.
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Helimagnetism from competing intra- and interchain interactions in CrBr$_2$ and CrI$_2$
Inelastic neutron scattering shows that helimagnetic order in CrBr2 and CrI2 arises from competing antiferromagnetic intrachain and interchain nearest-neighbor exchange, with a substantial easy-axis anisotropy.