Abstract
We report a Fe K x-ray emission spectroscopy study of local magnetic moments in various iron-based superconductors in their paramagnetic phases. Local magnetic moments are found in all samples studied: PrFeAsO, , LiFeAs, Fe(Te,Se), and (where , Rb, and Cs). The moment size is independent of temperature or carrier concentration but varies significantly across different families. Specifically, all iron pnictide samples have local moments of about 1/Fe, while FeTe and families have much larger local moments of /Fe and /Fe, respectively. Our results illustrate the importance of multiorbital physics in describing magnetism of these compounds.
- Received 30 August 2011
DOI:https://doi.org/10.1103/PhysRevB.84.100509
©2011 American Physical Society