K Matsuhira et al 2002 J. Phys.: Condens. Matter 14 L559 doi:10.1088/0953-8984/14/29/101
K Matsuhira1, Z Hiroi2, T Tayama2, S Takagi1 and T Sakakibara2
Show affiliationsThe low-temperature magnetic properties of the pyrochlore compound Dy2Ti2O7 in magnetic fields applied along the [111] direction are reported. Below 1 K, a clear plateau has been observed in the magnetization process in the field range 2–9 kOe, followed by a sharp moment jump at around 10 kOe that corresponds to a breaking of the spin ice state. We found that the plateau state is disordered, with a residual entropy of nearly half the value for the zero-field state, whose macroscopic degeneracy comes from a frustration of the spins on the Kagomé layers perpendicular to the magnetic field.
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
75.40.-s Critical-point effects, specific heats, short-range order
Issue 29 (29 July 2002)
Received 7 June 2002
Published 11 July 2002
K Matsuhira et al 2002 J. Phys.: Condens. Matter 14 L559
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