Measurement of top-quark properties with the ATLAS detector at the LHC

Due to its high mass top quarks decay before top-flavoured hadrons can be formed. This feature yields experimental access to the top quark polarization and production asymmetries. The large top quark sample moreover enables measurements of other properties, such as the $W$-boson branching ratios and helicity, and fragmentation functions of the bottom quarks. In this contribution, recent measurements of top-quark properties within the ATLAS Experiment are presented, including in particular a first analysis of the energy asymmetry in $t\bar{t}$ production, the first analysis of charge asymmetry in $t\bar{t}+\gamma$ production and a measurement of top-quark polarisation in single-top quark production.