Journal
PHYSICAL REVIEW B
Volume 83, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.094516
Keywords
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Funding
- US National Science Foundation [DMR-0756568]
- US Department of Energy, Division of Scientific User Facilities
- Natural Science Foundation of China
- Ministry of Science and Technology of China [2011CBA00110]
- Chinese Academy of Sciences
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0756568] Funding Source: National Science Foundation
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We use neutron scattering to study the magnetic-field effect on the static antiferromagnetic (AF) order and low-energy spin excitations in the underdoped iron arsenide superconductor BaFe1.92Ni0.08As2. At zero field, superconductivity that occurs below a critical temperature of T-c = 17 K coincides with the appearance of a neutron spin resonance and reduction in the static ordered moment. Upon application of a similar to 10-T magnetic field in the FeAs plane, the intensity of the resonance is reduced, accompanied by decreasing T-c and enhanced static AF scattering. These results are similar to those for some copper oxide superconductors, and demonstrate that the static AF order is a competing phase to superconductivity in BaFe1.92Ni0.08As2.
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