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We have observed a magnetic vortex lattice (VL) in BaFe2(As_{0.67}P_{0.33})2 (BFAP) single crystals by small-angle neutron scattering (SANS). With the field along the c-axis, a nearly isotropic hexagonal VL was formed in the field range…

We present small angle neutron scattering studies of the vortex lattice (VL) in CeCoIn5 with magnetic fields applied parallel (H) to the antinodal [100] and nodal [110] directions. For H || [100], a single VL orientation is observed, while…

The magnetic phase diagram of slightly overdoped La{2-x}Sr{x}CuO{4} (x=0.17) is characterised by a field-induced hexagonal to square transition of the vortex lattice at low fields (~0.4 Tesla) [R. Gilardi et al., Phys. Rev. Lett. 88, 217003…

Superconductivity · Physics 2009-11-10 R. Gilardi , S. Streule , A. J. Drew , U. Divakar , S. L. Lee , S. P. Brown , E. M. Forgan , N. Momono , M. Oda , J. Mesot

We report here on the first direct observations of the vortex lattice in the bulk of electron-doped Nd$_{1.85}$Ce$_{0.15}$CuO$_{4}$ single crystals. Using small angle neutron scattering, we have observed a square vortex lattice with the…

Superconductivity · Physics 2009-11-10 R. Gilardi , J. Mesot , S. P. Brown , E. M. Forgan , A. Drew , S. L. Lee , R. Cubitt , C. D. Dewhurst , T. Uefuji , K. Yamada

The magnetic field distribution around the vortices in TmNi2B2C in the paramagnetic phase was studied experimentally as well as theoretically. The vortex form factor, measured by small-angle neutron scattering, is found to be field…

The superconducting and magnetic properties of HoNi2B2C single crystals are investigated through transport, magnetometry and small-angle neutron scattering measurements. In the magnetic phases that enter below the superconducting critical…

Superconductivity · Physics 2015-06-19 M. Ramazanoglu , M. Laver , A. Yagmurcu , E. -M. Choi , S. -I. Lee , A. Knigavko , B. D. Gaulin

We report a direct observation of the magnetic vortex lattice in the model high-temperature superconductor HgBa2CuO4+x. Using small-angle neutron scattering on high-quality crystals, we observe two equal domains of undistorted triangular…

Superconductivity · Physics 2015-05-20 Yuan Li , N. Egetenmeyer , J. L. Gavilano , N. Barisic , M. Greven

The vortex lattice (VL) in the high-kappa superconductor YBa2Cu3O7, at 2 K and with the magnetic field parallel to the crystal c-axis, undergoes a sequence of transitions between different structures as a function of applied magnetic field.…

We present small angle neutron scattering studies of the magnetic vortex lattice (VL) in Ca$_{0.04}$Y$_{0.96}$Ba$_{2}$Cu$_{3}$O$_{7}$ up to a field of 16.7 T, and Ca$_{0.15}$Y$_{0.85}$Ba$_{2}$Cu$_{3}$O$_{7}$ up to 25 T. We find that the…

Neutron diffraction and small angle scattering experiments have been carried out on the double-isotopic polycrystalline sample (7Li0.82Fe0.18OD)FeSe. Profile refinements of the diffraction data establish the composition and reveal an…

The superconductor TmNi2B2C possesses a significant four-fold basal plane anisotropy, leading to a square Vortex Lattice (VL) at intermediate fields. However, unlike other members of the borocarbide superconductors, the anisotropy in…

Using the small angle neutron scattering (SANS) technique we investigated the vortex lattice (VL) in the mixed state of the stannide superconductor Yb$_{3}$Rh$_{4}$Sn$_{13}$. We find a single domain VL of slightly distorted hexagonal…

Superconductivity · Physics 2015-06-19 D. Mazzone , J. L. Gavilano , R. Sibille , M. Ramakrishnan , M. Kenzelmann

A low energy radioactive beam of polarized $^8$Li has been used to observe the vortex lattice near the surface of superconducting NbSe$_2$. The inhomogeneous magnetic field distribution associated with the vortex lattice was measured using…

Below T_{WFM} ~ 2.75K, a weak ferromagnetism and superconductivity coexist in ErNi2B2C. In the present paper, a possibility of a spontaneous vortex phase was examined directly by small angle neutron scattering technique. An external…

Superconductivity · Physics 2007-05-23 H. Kawano-Furukawa , E. Habuta , T. Nagata , M. Nagao , H. Yoshizawa , N. Furukawa , H. Takeya , K. Kadowaki

We report on small angle neutron scattering measurements of the vortex lattice in twin-free YBa2Cu3O7, extending the previously investigated maximum field of 11~T up to 16.7~T with the field applied parallel to the c axis. This is the first…

Superconductivity · Physics 2015-06-19 A. S. Cameron , J. S. White , A. T. Holmes , E. Blackburn , E. M. Forgan , R. Riyat , T. Loew , C. D. Dewhurst , A. Erb

Using small-angle neutron scattering we have measured the misalignment between an applied field of 4 kOe and the flux-line lattice in MgB$_2$, as the field is rotated away from the c axis by an angle $\theta$. The measurements, performed at…

We report on the evolution with magnetic field and temperature of the vortex lattice (VL) in fully-oxygenated YBa2Cu3O7 as studied by time-of-flight small angle neutron scattering. Using the HFM/EXED beamline, we have obtained data up to…

Superconducting vortex lattices, glasses and liquids attract great interest as model systems of crystallization and as a source of microscopic information of the nature of superconductivity. We report for the first time direct microscopic…

Strongly Correlated Electrons · Physics 2015-05-27 S. Mühlbauer , C. Pfleiderer , P. Böni , E. M. Forgan , E. H. Brandt , A. Wiedenmann , U. Keiderling , G. Behr

Using analytical expressions for the magnetization textures of thin submicron-sized magnetic cylinders in vortex state, we derive closed-form algebraic expressions for the ensuing small-angle neutron scattering (SANS) cross sections.…

Mesoscale and Nanoscale Physics · Physics 2016-04-27 Konstantin L. Metlov , Andreas Michels

Using small-angle neutron scattering we have studied the superconducting vortex lattice (VL) phase diagram in MgB2 as the applied magnetic field is rotated away from the c axis and towards the basal plane. The field rotation gradually…

Superconductivity · Physics 2021-03-25 A. W. D. Leishman , A. Sokolova , M. Bleuel , N. D. Zhigadlo , M. R. Eskildsen
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