Beyond the Standard Model Higgs Physics using the ATLAS Experiment

With the discovery of a Higgs boson that has properties consistent with the Standard Model at the LHC, searches for additional Higgs bosons due to beyond the Standard Model physics become more interesting and relevant. This article summarises the current searches for such new Higgs bosons performed with the ATLAS detector, using proton-proton collisions at centre of mass energies of 7 and 8 TeV at LHC. No significant deviations from the predictions of the Standard Model are observed in any search channel and hence limits on physics beyond the Standard Model are calculated.