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- National Institute of Standards and TechnologyUS801 papers
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23 papers · 2 filters
Lattice collapse and quenching of magnetism in CaFe2As2 under pressure: A single crystal neutron and x-ray diffraction investigation
A. I. Goldman, A. Kreyssig, K. Prokes +15
Single crystal neutron and high-energy x-ray diffraction have identified the phase lines corresponding to transitions between the ambient-pressure tetragonal (T), the antiferromagn…
First-order magnetic and structural phase transitions in FeSeTe
Shiliang Li, Clarina de la Cruz, Q. Huang +8
We use bulk magnetic susceptibility, electronic specific heat, and neutron scattering to study structural and magnetic phase transitions in FeSe% Te. Fe$_{1.068…
Extreme Sensitivity of Superconductivity to Stoichiometry in FeSe (Fe1+dSe)
T. M. McQueen, Q. Huang, V. Ksenofontov +10
The recently discovered iron arsenide superconductors, which display superconducting transition temperatures as high as 55 K, appear to share a number of general features with high…
Neutron scattering Measurements of the phonon density of states of FeSe superconductors
D. Phelan, J. N. Millican, E. L. Thomas +3
Inelastic neutron-scattering experiments have been carried out on polycrystalline samples of the FeSe superconductors. We report the phonon density of states for FeSe$_{1-x…
Fermi surface and order parameter driven vortex lattice structure transitions in twin-free YBa2Cu3O7
J. S. White, V. Hinkov, R. W. Heslop +12
We report on small-angle neutron scattering studies of the intrinsic vortex lattice (VL) structure in detwinned YBa2Cu3O7 at 2 K, and in fields up to 10.8 T. Because of the suppres…
Doping evoluton of antiferromagnetic order and structural distortion in LaFeAsOF
Q. Huang, Jun Zhao, J. W. Lynn +4
We use neutron scattering to study the structural distortion and antiferromagnetic (AFM) order in LaFeAsOF as the system is doped with fluorine (F) to induce supercon…