Magnetostriction and magnetic texture to 97.4 Tesla in frustrated SrCu2(BO3)2

Details Magnetostriction and magnetic texture to 97.4 Tesla in frustrated SrCu2(BO3)2 Magnetostriction and magnetic texture to 97.4 Tesla in frustrated SrCu2(BO3)2

2012-02-03

arxiv.org/abs/1202.0812v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, 4 figures, submitted

Scientific paper

Strong geometrical frustration in magnets leads to exotic states, such as spin liquids, spin supersolids and complex magnetic textures. SrCu2(BO3)2, a spin-1/2 Heisenberg antiferromagnet in the archetypical Shastry-Sutherland lattice, exhibits a rich spectrum of magnetization plateaus and stripe-like magnetic textures in applied fields. The structure of these plateaus is still highly controversial due to the intrinsic complexity associated with frustration and competing length scales. We reveal new magnetic textures in SrCu2(BO3)2 via magnetostriction and magnetocaloric measurements in fields up to 97.4 Tesla. In addition to observing the low-field fine structure of the plateaus with unprecedented resolution, the data also reveal lattice responses at 82 T and at 73.6 T which we attribute, using a controlled density matrix renormalization group approach, to the long-predicted 1/2-saturation plateau, and to a new 2/5 plateau.

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