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Incommensurate interactions and nonconventional spin-Peierls transition in TiOBr

Sander van Smaalen, Lukas Palatinus, and Andreas Schönleber
Phys. Rev. B 72, 020105(R) – Published 22 July 2005

Abstract

Temperature-dependent x-ray diffraction of the low-dimensional spin-12 quantum magnet TiOBr shows that the phase transition at Tc2=47.1(4)K corresponds to the development of an incommensurate superstructure. Below Tc1=26.8±0.3K the incommensurate modulation locks in into a twofold superstructure similar to the low-temperature spin-Peierls state of TiOCl. Frustration between intra- and interchain interations within the spin-Peierls scenario, and competition between the two-dimensional magnetic order and one-dimensional spin-Peierls order are discussed as possible sources of the incommensurability.

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  • Received 18 April 2005

DOI:https://doi.org/10.1103/PhysRevB.72.020105

©2005 American Physical Society

Authors & Affiliations

Sander van Smaalen1,*, Lukas Palatinus1,2, and Andreas Schönleber1

  • 1Laboratory of Crystallography, University of Bayreuth, 95440 Bayreuth, Germany
  • 2Institute of Physics, Czech Academy of Sciences, 162 53 Prague, Czechia

  • *Electronic address: smash@uni-bayreuth.de

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Issue

Vol. 72, Iss. 2 — 1 July 2005

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