Abstract
Multifunctional materials promise to provide the foundation for a class of devices in which electrical, magnetic, elastic, and other properties are coupled to one another. Here we present evidence for piezoelectricity and antiferromagnetic ordering in a multifunctional material . Through the use of second-harmonic generation and x-ray linear dichroism, we determine a transition from a polar-only state to a polar and magnetic state below . In combination with theory, the magnetic symmetry has been narrowed to be type or spin glass. An effective piezoelectric coefficient of was also measured in the polar state at room temperature.
- Received 24 October 2006
DOI:https://doi.org/10.1103/PhysRevB.75.060101
©2007 American Physical Society