Revisiting the influence of Fe excess in the synthesis of BaFe2S3

${\mathrm{BaFe}}_{2}{\mathrm{S}}_{3}$ is a quasi-one-dimensional antiferromagnetic insulator that becomes superconducting under hydrostatic pressure. The magnetic ordering temperature ${T}_{N}$, as well the presence of superconductivity have been found to be sample dependent. It has argued Fe content may play decisive role, with use 5 mol% ($\ensuremath{\delta}=0.1$) excess being reportedly required during synthesis optimize and properties. However, it yet unclear whether off-stoichiometry actually present in samples, how affects structural, magnetic, transport Here, we systematic study compositional, physical properties ${\mathrm{BaFe}}_{2+\ensuremath{\delta}}{\mathrm{S}}_{3}$ function nominal $\ensuremath{\delta}$. As $\ensuremath{\delta}$ increases, observe an increasing fraction secondary phases but no change average composition or crystal structure main phase. Magnetic susceptibility curves are influenced by phases. While small (2.5 mol%, i.e., $\ensuremath{\delta}=0.05$) can slightly increase ${T}_{N}$ decrease resistivity anomaly at ${T}^{*}$, range ${T}_{N}^{\ensuremath{'}}\mathrm{s}/{T}^{*}$'s observed within each batch. This result strongly contrasts previously reported maximum $\ensuremath{\delta}=0.1$. Rather than value $\ensuremath{\delta}$, ${T}^{*}$ seem correlate broadening logarithmic derivative around could indicator level disorder samples. Finally, show crystals free ferromagnetic obtained remelting samples $\ensuremath{\delta}=0.05$ Bridgman-like process based on optical heating.