Abstract
Temperature-dependent x-ray diffraction on has shown that the orthorhombic lattice symmetry of this compound persist down to a temperature of at least 9 K, i.e., into the charge-density-wave (CDW) state below and in the ferromagnetically ordered state below . The modulated crystal structure has been determined for the incommensurate CDW state with at . The observed atomic modulation displacements indicate that the CDW should be considered as a commensurate CDW centered on chains of Ni atoms along . Frustrated interchain coupling is responsible for the incommensurability of the three-dimensionally ordered CDW state.
- Received 5 July 2010
DOI:https://doi.org/10.1103/PhysRevB.82.054120
©2010 American Physical Society