Incomplete Devil’s Staircase in the Magnetization Curve of SrCu2(BO3)2

M. Takigawa, M. Horvatić, T. Waki, S. Krämer, C. Berthier, F. Lévy-Bertrand, I. Sheikin, H. Kageyama, Y. Ueda, and F. Mila
Phys. Rev. Lett. 110, 067210 – Published 8 February 2013
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Abstract

We report on NMR and torque measurements on the frustrated quasi-two-dimensional spin-dimer system SrCu2(BO3)2 in magnetic fields up to 34 T that reveal a sequence of magnetization plateaus at 1/8, 2/15, 1/6, and 1/4 of the saturation and two incommensurate phases below and above the 1/6 plateau. The magnetic structures determined by NMR involve a stripe order of triplets in all plateaus, suggesting that the incommensurate phases originate from proliferation of domain walls. We propose that the magnetization process of SrCu2(BO3)2 is best described as an incomplete devil’s staircase.

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  • Received 13 August 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.067210

© 2013 American Physical Society

Authors & Affiliations

M. Takigawa1,*, M. Horvatić2, T. Waki3, S. Krämer2, C. Berthier2, F. Lévy-Bertrand2,†, I. Sheikin2, H. Kageyama4, Y. Ueda1, and F. Mila5

  • 1Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
  • 2Laboratoire National des Champs Magnétique Intenses , LNCMI-CNRS (UPR3228), UJF, UPS and INSA, BP 166, 38042 Grenoble Cedex 9, France
  • 3Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan
  • 4Department of Energy and Hydrocarbon Chemistry, Kyoto University, Kyoto 615-8510, Japan
  • 5Institute of Theoretical Physics, École Polytechnique Fédérale de Lausanne, CH-1015 Laussane, Switzerland

  • *masashi@issp.u-tokyo.ac.jp
  • Present address: Institut Néel, CNRS and UFJ, BP 166, 38042 Grenoble Cedex 9, France.

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Vol. 110, Iss. 6 — 8 February 2013

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Heating up of Superconductors
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