A new macroscopically degenerate ground state in the spin ice compound Dy2Ti2O7 under a magnetic field

Details A new macroscopically degenerate ground state in the spin ice compound Dy2Ti2O7 under a magnetic field A new macroscopically degenerate ground state in the spin ice compound Dy2Ti2O7 under a magnetic field

2002-07-23

arxiv.org/abs/cond-mat/0207543v1

Jouranl of Physics: Condensed Matter 14 (2002) L559

Physics

Condensed Matter

Materials Science

PDF file. 11 pages, 5 figures

Scientific paper

10.1088/0953-8984/14/29/101

The low temperature magnetic properties of 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 the residual entropy of nearly half the value of the zero-field state, whose macroscopic degeneracy comes from a frustration of the spins on the kagome layers perpendicular to the magnetic field.

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