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

Abstract

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.

12 pages, 4 figures, submitted

References in corpus (6)

• Spin Liquid Ground State of the $S=1/2$ Kagome Heisenberg Model
• High resolution magnetostriction measurements in pulsed magnetic fields using Fibre Bragg Gratings
• Effective Theory of Magnetization Plateaux in the Shastry-Sutherland Lattice
• Field dependence of the quantum ground state in the Shastry-Sutherland system SrCu${}_2$(BO${}_3$)${}_2$
• Ordered magnetic phases of the frustrated spin-dimer compound Ba3Mn2O8
• NMR evidence for the persistence of spin-superlattice above the 1/8 magnetization plateau in SrCu2(BO3)2

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