  A direct search for lepton-flavour-violating (LFV) $H\to\mu\tau$ decays of
the recently discovered Higgs boson with the ATLAS detector at the LHC is
presented. The analysis is performed in the $H\to\mu\tau_{\mathrm{had}}$
channel, where $\tau_{\mathrm{had}}$ is a hadronically decaying $\tau$-lepton.
The search is based on the data sample of proton--proton collisions collected
by the ATLAS experiment corresponding to an integrated luminosity of 20.3
fb$^{-1}$ at a centre-of-mass energy of $\sqrt{s}=8$ TeV. No statistically
significant excess of data over the predicted background is observed. The
observed (expected) 95% confidence-level upper limit on the branching fraction,
Br($H\to\mu\tau$), is 1.85% (1.24%).
