Journal
PHYSICAL REVIEW B
Volume 92, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.92.094515
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Funding
- Materials Sciences and Engineering Division, Basic Energy Sciences, Office of Science, U.S. Department of Energy
- DOE Office of Science by Argonne National Laboratory [DE-AC02-06CH11357]
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Combined neutron and x-ray diffraction experiments demonstrate the formation of a low-temperature minority magnetic tetragonal phase in Ba0.76K0.24Fe2As2 in addition to the majority magnetic, orthorhombic phase. The coincident enhancement in the magnetic (1/2 1/2 1) peaks shows that this minority phase is of the same type that was observed in Ba1-xNaxFe2As2 (0.24 <= x <= 0.28), in which the magnetic moments reorient along the c axis. This is evidence that the tetragonalmagnetic phase is a universal feature of the hole-doped iron-based superconductors. The observations suggest that in this regime the energy levels of the C-2 and C-4 symmetric magnetic phases are very close.
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