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Neutron scattering patterns show Superconductivity in FeTe0.5Se0.5 likely results from itinerant electron fluctuations
H. A. Mook, M. D. Lumsden, A. D. Christianson +8
The discovery of the Fe pnictide superconductors generated great interest as the structure consists of planes of a magnetic material quite similar to the cuprate superconductors. F…
75As NMR Observation of Anisotropic Spin Fluctuations in the Ba[(Fe0.92Co0.08)2]2As2 Superconductor (Tc = 22 K)
Fanlong Ning, Kanagasingham Ahilan, Takashi Imai +5
We demonstrate that the anisotropy R of the paramagnetic spin fluctuations grows toward Tc at 75As sites in the optimally electron-doped superconductor Ba[(Fe0.92Co0.08)2]2As2, wit…
Suppression of spin density wave by isoelectronic substitution in PrFe(1-x)Ru(x)AsO
Michael A. McGuire, David J. Singh, Athena S. Sefat +2
We have studied the effects of the isoelectronic substitution of Ru for Fe in polycrystalline samples of the spin density wave (SDW) material PrFeAsO. Crystal structures from powde…
Bulk Superconductivity at 14 K in Single Crystals of Fe1+yTexSe1-x
B. C. Sales, A. S. Sefat, M. A. McGuire +3
Resistivity, magnetic susceptibility and heat capacity measurements are reported for single crystals of Fe1+yTexSe1-x grown via a modified Bridgeman method with 0 < y < 0.15, and x…
Structure and Anisotropic Properties of BaFe2-xNixAs2 (x = 0, 1, 2) Single Crystals
Athena S. Sefat, Rongying Jin, Michael A. McGuire +5
The crystal structure, anisotropic electrical resistivity and magnetic susceptibility, as well as specific heat results from single crystals of BaFe2As2, BaNi2As2, and BaFeNiAs2 ar…
Renormalized behavior and proximity to a magnetic quantum critical point in BaCoAs
A. S. Sefat, D. J. Singh, R. Jin +3
We report synthesis and single crystal measurements of magnetic, transport and thermal properties of single crystalline BaCoAs as well as first principles calculations of t…