Measurements of Higgs boson couplings and their interpretations in fermionic decay modes at the ATLAS experiment

Detailed measurements of Higgs boson properties and its interactions can be performed using its decays into fermions, providing a key window into the nature of the Yukawa interactions. This talk presents the latest measurements of the Higgs boson properties in various leptonic (ττ, μμ) and quark (bb,cc) decay channels by the ATLAS experiment, using the full Run 2 pp collision dataset collected at 13 TeV. They include in particular measurements within the Simplified Template Cross Section framework, and their interpretations in specific scenarios of physics beyond the Standard Model, as well as generic extensions in the context of Standard Model Effective Field Theories.