Abstract
Zero-field (ZF) muon-spin-relaxation (μSR) measurements have revealed static commensurate magnetic order of Fe moments in NdFeAsO below TN ∼135 K, with the ordered moment size nearly equal to that in LaFeAsO, and confirmed similar behavior in BaFe2 As2. In single crystals of superconducting Ba0.55 K0.45 Fe2 As2, μSR spectra indicate static magnetism with incommensurate or short-ranged spin structure in ∼70% of volume below TN ∼80 K, coexisting with the remaining volume which exhibits a superfluid response below Tc ∼30 K.
Original language | English |
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Article number | 214503 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 78 |
Issue number | 21 |
DOIs | |
State | Published - Dec 1 2008 |
Externally published | Yes |