Commensurate and incommensurate magnetic order in CaFe$_4$As$_3$
ORAL
Abstract
Magnetic order in newly discovered orthorhombic CaFe$_4$As$_3$ was examined through neutron diffraction on powder and single crystalline samples. The structure can be described as interleaving FeAs strips extending along the $b$ axis. Longitudinally polarized magnetic order with an incommensurate propagation vector $0.37b^{\ast}
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