期刊
PHYSICAL REVIEW B
卷 78, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.214503
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
资金
- U.S. NSF [DMR-05-02706, DMR-08-06846, DMR-07-56568]
- U.S. DOE [DE-AC02-07CH11358]
- NSERC and CIFAR (Canada) at McMaster
- CNPq on MWN-CIAM program at CBPF (Brazil)
- NSFC, CAS
- MOST (China) at IOP, Beijing
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0756568] Funding Source: National Science Foundation
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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