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Magnetic field effect on static antiferromagnetic order and spin excitations in the underdoped iron arsenide superconductor BaFe1.92Ni0.08As2

Miaoyin Wang, Huiqian Luo, Meng Wang, Songxue Chi, Jose A. Rodriguez-Rivera, Deepak Singh, Sung Chang, Jeffrey W. Lynn, Pengcheng Dai
2011 Physical Review B  

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https://web.archive.org/web/20180719084601/https://link.aps.org/accepted/10.1103/PhysRevB.83.094516

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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 Tc = 17 K coincides with the appearance of a neutron spin resonance and reduction in the static ordered moment. Upon application of a ∼10-T magnetic field in the FeAs-plane, the intensity of the resonance is reduced, accompanied by decreasing Tc
more » ... nd 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.
doi:10.1103/physrevb.83.094516 fatcat:ajscq5dmcffkdcxrez5vwbufxi
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Miaoyin Wang, Huiqian Luo, Meng Wang, Songxue Chi, Jose A. Rodriguez-Rivera, Deepak Singh, Sung Chang, Jeffrey W. Lynn, Pengcheng Dai. "Magnetic field effect on static antiferromagnetic order and spin excitations in the underdoped iron arsenide superconductor BaFe1.92Ni0.08As2." Physical Review B 83.9 (2011)