Abstract
Temperature-dependent x-ray diffraction of the low-dimensional spin- quantum magnet TiOBr shows that the phase transition at corresponds to the development of an incommensurate superstructure. Below 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.
- Received 18 April 2005
DOI:https://doi.org/10.1103/PhysRevB.72.020105
©2005 American Physical Society