  The half-doped manganite, (Eu0.4La0.1)(Sr0.4Ca0.1)MnO3, has been found to
exhibit sharp step-like metamagnetic transitions below 5 K. The number of
magnetic steps increases with decreasing temperature and this number suddenly
rises from 3 at 2 K to ~50 at 1.7 K. The self-similar character of the multiple
magnetic steps at reduced temperature identifies these steps as avalanche-like
transitions. The occurrence of a multitude of magnetic steps at low
temperatures, the decreasing effect of magnetic field sweep rate on the
step-like metamagnetism, and the decreasing irreversibility of transition in
the specific heat suggest that reduced spin-lattice coupling facilitates the
transformation of antiferromagnetic to ferromagnetic state via an
avalanche-like behavior.
