Muon-spin-relaxation studies of magnetic order and superfluid density in antiferromagnetic NdFeAsO, BaFe2As2, and superconducting Ba1-xKxFe2As2
Date
2008-12-01
Authors
Aczel, A. A.
Baggio-Saitovitch, E.
Bud'ko, Sergey L.
Carlo, J. P.
Chen, G. F.
Dai, Pengcheng
Goko, T.
Hu, W. Z.
Luke, G. M.
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American Physical Society
Abstract
Zero-field (ZF) muon-spin-relaxation (mu SR) measurements have revealed static commensurate magnetic order of Fe moments in NdFeAsO below T-N similar to 135 K, with the ordered moment size nearly equal to that in LaFeAsO, and confirmed similar behavior in BaFe2As2. In single crystals of superconducting Ba0.55K0.45Fe2As2, mu SR spectra indicate static magnetism with incommensurate or short-ranged spin structure in similar to 70% of volume below T-N similar to 80 K, coexisting with the remaining volume which exhibits a superfluid response below T-c similar to 30 K.
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Comments
This article is published as Aczel, A. A., E. Baggio-Saitovitch, S. L. Budko, P. C. Canfield, J. P. Carlo, G. F. Chen, Pengcheng Dai et al. "Muon-spin-relaxation studies of magnetic order and superfluid density in antiferromagnetic NdFeAsO, BaFe 2 As 2, and superconducting Ba 1− x K x Fe 2 As 2." Physical Review B 78, no. 21 (2008): 214503.
DOI: 10.1103/PhysRevB.78.214503.
Copyright 2008 American Physical Society.
Posted with permission.