Abstract
We report a Fe Kβ 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, Ba( Fe,Co)2As2, LiFeAs, Fe1+x(Te,Se), and A 2Fe4Se5 (where A=K, 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 1μB/Fe, while FeTe and K 2Fe4Se5 families have much larger local moments of ∼2μB/Fe and ∼3.3μB/Fe, respectively. Our results illustrate the importance of multiorbital physics in describing magnetism of these compounds.
Original language | English |
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Article number | 100509 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 84 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2011 Sep 22 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics