Exotics searches in top, top-like and diboson final states with the ATLAS detector

We present analyses for top quark and top quark like final states using an integrated luminosity of 33 to $200,mathrm{pb^{-1}}$ of data recorded with the ATLAS experiment. The analyes including searches for resonances decaying into $tar{t}$, top-pair final states with anomalous missing energy, and a search for fourth generation quarks decaying top-like. Cross section limits are shown for the production of an heavy $Z^prime$ decaying into $tar{t}$. In Randall-Sundrum models, Kaluza-Klein gluons with masses below $650,mathrm{GeV}$ are excluded at 95% C.L. In the contents of quantum black holes, enhanced $t$ + X production with a mass threshold below $2.35,mathrm{TeV}$ is excluded. The production of an heavy top decaying into an top quark plus a heavy stable neutral particle exclusion limits are set for a heavy top mass of $275,mathrm{GeV}$ for a neutral particle mass less than $50,mathrm{GeV}$ and a mass of $300,mathrm{GeV}$ for a neutral particle mass less than $10,mathrm{GeV}$. We exclude at 95% confidence level a heavy top like decaying quark with mass less than $270,mathrm{GeV/c²}$.}