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6 papers · 2 filters
Pressure-induced isostructural phase transition and correlation of FeAs coordination with the superconducting properties of 111-type Na1-xFeAs
Qingqing Liu, Xiaohui Yu, Xiancheng Wang +15
The effect of pressure on the crystalline structure and superconducting transition temperature (Tc) of the 111-type Na1-xFeAs system using in situ high pressure synchrotron x-ray p…
Effect of half-quantum vortices on magnetoresistance of perforated superconducting films
Victor Vakaryuk, Valerii Vinokur
Recent cantilever magnetometry measurements of annular micron-size samples of Sr2RuO4 have revealed evidence for the existence of half-quantum vortices (HQVs) in this material [Jan…
Spatial Inhomogeneity in RFeAsO1-xFx (R =Pr, Nd) Determined from Rare Earth Crystal Field Excitations
E. A. Goremychkin, R. Osborn, C. H. Wang +8
We report inelastic neutron scattering measurements of crystal field transitions in PrFeAsO, PrFeAsO0.87F0.13, and NdFeAsO0.85F0.15. Doping with fluorine produces additional crysta…
Magnetoelastic Coupling in the Phase Diagram of Ba1-xKxFe2As2
Sevda Avci, Omar Chmaissem, Eugene A. Goremychkin +10
We report a high resolution neutron diffraction investigation of the coupling of structural and magnetic transitions in Ba1xKxFe2As2. The tetragonal-orthorhombic and antiferromagne…
Anisotropic Phase Diagram and Superconducting Fluctuations in SmFeAsO0.85F0.15
U. Welp, C. Chaparro, A. E. Koshelev +5
We report on the specific heat determination of the anisotropic phase diagram of single crystals of optimally doped SmFeAsO1-xFx. In zero-field, the optimally doped compound displa…
Observation of half-height magnetization steps in Sr2RuO4
J. Jang, D. G. Ferguson, V. Vakaryuk +4
Spin-triplet superfluids can support exotic objects, such as half-quantum vortices characterized by the nontrivial winding of the spin structure. We present cantilever magnetometry…