Muon-spin-relaxation studies of magnetic order and superfluid density in antiferromagnetic NdFeAsO, BaFe2As2, and superconducting Ba1-xKxFe2As2

Aczel  AA; Baggio-Saitovitch  E; Budko  SLCanfield  PCCarlo  JPChen  GFDai  PCGoko  THu  WZLuke  GM

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Muon-spin-relaxation studies of magnetic order and superfluid density in antiferromagnetic NdFeAsO, BaFe2As2, and superconducting Ba1-xKxFe2As2

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摘要

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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来源
《Physical review, B. Condensed matter and materials physics》 |2008年第21期|214503-1-214503-5-0|共5页
作者
Aczel AA; Baggio-Saitovitch E; Budko SLCanfield PCCarlo JPChen GFDai PCGoko THu WZLuke GM;
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作者单位

[Baggio-Saitovitch, E;

Sanchez-Candela, DR] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil;

[Budko, SLCanfield, PCNi, N] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USANi, N] McMaster Univ, Ames Lab, Hamilton, ON L8S 4M1, Canada[Aczel, AAGoko, T;

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正文语种英语
中图分类固体物理学;
关键词
antiferromagnetic materials; barium compounds; high-temperature superconductors; iron compounds; magnetic moments; magnetic structure; magnetic superconductors; muon probes; Neel temperature; neodymium compounds; potassium compounds; superfluidity; LAYERED SUPERCONDUCTOR; PENETRATION-DEPTH; PHASE-DIAGRAM; CUPRATE;

Muon-spin-relaxation studies of magnetic order and superfluid density in antiferromagnetic NdFeAsO, BaFe2As2, and superconducting Ba1-xKxFe2As2

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