Abstract
We present a novel field-induced phase transition in the spin ice compoundDy2Ti2O7 that is investigated by means of angle-resolved DC magnetization measurements. In thenear [112] field, the magnetization component perpendicular to the Kagomé plane shows afirst-order phase transition below 0.27 K. This transition is driven by a ferromagneticordering in the field-decoupled spins on the triangular lattice. Furthermore, we revealedanother first-order phase transition below 0.52 K in a magnetic field between the [110] and[111] directions. This phase transition is related to a breakdown of ferromagnetic Ising spinchains along or .
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