Abstract
We present the investigation of a monoclinic compound SeCuO using x-ray powder diffraction, magnetization, torque, and electron-spin-resonance. Structurally based analysis suggests that SeCuO can be considered as a three-dimensional network of tetramers. The values of intratetramer exchange interactions are extracted from the temperature dependence of the susceptibility and amount to K. The intertetramer coupling leads to the development of long-range antiferromagnetic order at K. An unusual temperature dependence of the effective tensors is observed, accompanied with a rotation of macroscopic magnetic axes. We explain this unique observation as due to site-selective quantum correlations.
4 More- Received 30 April 2012
DOI:https://doi.org/10.1103/PhysRevB.86.054405
©2012 American Physical Society