Antiferromagnetic order in and its interplay with superconductivity
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
The magnetic order in CaK(Fe1-xNix)4As4 (1144) single crystals (x=0.051 and 0.033) has been studied by neutron diffraction. We observe magnetic Bragg peaks associated with the same propagation vectors as found for the collinear stripe antiferromagnetic (AFM) order in the related BaFe2As2 (122) compound. The AFM state in 1144 preserves tetragonal symmetry and only a commensurate, noncollinear structure with a hedgehog spin-vortex crystal (SVC) arrangement in the Fe plane and simple AFM stacking along the c direction is consistent with our observations. The SVC order is promoted by the reduced symmetry in the FeAs layer in the 1144 structure. The long-range SVC order coexists with superconductivity, however, similar to the doped 122 compounds, the ordered magnetic moment is gradually suppressed with the developing superconducting order parameter. This supports the notion that both collinear and noncollinear magnetism and superconductivity are competing for the same electrons coupled by Fermi surface nesting in iron arsenide superconductors.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-07CH11358; AC02-06CH11357; GBMF4411; AC05-00OR22725
- OSTI ID:
- 1460401
- Alternate ID(s):
- OSTI ID: 1457574; OSTI ID: 1468098
- Report Number(s):
- IS-J-9703; PRBMDO; TRN: US1901876
- Journal Information:
- Physical Review B, Vol. 97, Issue 22; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Effect of pressure on the self-hole-doped superconductor RbGd 2 Fe 4 As 4 O 2
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journal | December 2018 |
Effect of Ni doping on vortex pinning in CaK ( F e 1 − x N i x ) 4 A s 4 single crystals
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journal | August 2019 |
Analysis of the London penetration depth in Ni-doped
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journal | September 2019 |
Optical and photoemission investigation of structural and magnetic transitions in the iron-based superconductor
|
journal | December 2019 |
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