Publications (18)
Large lattice distortions associated with the magnetic transition in La0.7Sr0.3MnO3
F. Weber, D. Argyriou, O. Prokhnenko +1
Colossal magnetoresistance (CMR) is associated with the phase transition from a metallic ferromagnetic to insulating paramagnetic phase, which can be controlled by an applied magne…
Investigating field-induced magnetic order in Han Purple by neutron scattering up to 25.9 T
S. Allenspach, A. Madsen, A. Biffin +14
BaCuSiO is a quasi-two-dimensional (2D) quantum antiferromagnet containing three different types of stacked, square-lattice bilayer hosting spin-1/2 dimers. Although this c…
Probing superconducting order in overdoped CaYBaCuO by neutron diffraction measurements of the vortex lattice
A. S. Cameron, E. Campillo, A. Alshemi +13
We present small angle neutron scattering studies of the magnetic vortex lattice (VL) in CaYBaCuO up to a field of 16.7 T, and CaY$_{0.…
Emergent charge ordering in near half doped NaCoO
D. N. Argyriou, O. Prokhnenko, K. Kiefer +1
We have utilized neutron powder diffraction to probe the crystal structure of layered NaCoO near the half doping composition of 0.46 over the temperature range of 2…
Pre-saturation phase in the frustrated ferro-antiferromagnet PbVO(PO)
F. Landolt, S. Bettler, Z. Yan +8
Magnetization, magnetic torque, neutron diffraction and NMR experiments are used to map out the phase diagram of the prototypical quasi-two-dimensional ferro-antiferromag…
Enhanced ferroelectric polarization by induced Dy spin-order in multiferroic DyMnO3
O. Prokhnenko, R. Feyerherm, E. Dudzik +4
Neutron powder diffraction and single crystal x-ray resonant magnetic scattering measurements suggest that Dy plays an active role in enhancing the ferroelectric polarization in mu…
High-field magnetic structure of the triangular antiferromagnet RbFe(MoO4)2
Yu. A. Sakhratov, O. Prokhnenko, A. Ya. Shapiro +4
The magnetic H - T phase diagram of a quasi-two-dimensional antiferromagnet RbFe(MoO4)2 with an equilateral triangular lattice structure is studied with 87Rb NMR and neutron diffra…
Ga substitution as an effective variation of Mn-Tb coupling in multiferroic TbMnO3
O. Prokhnenko, N. Aliouane, R. Feyerherm +5
Ga for Mn substitution in multiferroic TbMnO has been performed in order to study the influence of Mn-magnetic ordering on the Tb-magnetic sublattice. Complete characterizati…
Magnetic-field induced effects on the electric polarization in RMnO3 (R = Dy, Gd)
R. Feyerherm, E. Dudzik, A. U. B. Wolter +8
X-ray resonant magnetic scattering studies of rare earth magnetic ordering were performed on perovskite manganites RMnO3 (R = Dy, Gd) in an applied magnetic field. The data reveal…
Noncollinear magnetic structure in U2Pd2In at high magnetic fields
K. Prokes, M. Bartkowiak, D. I. Gorbunov +3
We report an unexpected magnetic-field-driven magnetic structure in the 5f-electron Shastry- Sutherland system U2Pd2In. This phase develops at low temperatures from a noncollinear…
High-field spin-flop state in green dioptase
O. Prokhnenko, G. Marmorini, S. E. Nikitin +10
The high-field magnetic properties and magnetic order of the gem mineral green dioptase CuSiOHO have been studied by means of single-crystal neutron dif…
Magnetic ground state of the frustrated spin-1/2 chain compound -TeVO at high magnetic fields
M. Pregelj, A. Zorko, M. Klanjšek +7
Frustrated spin-1/2 chains, despite the apparent simplicity, exhibit remarkably rich phase diagram comprising vector-chiral (VC), spin-density-wave (SDW) and multipolar/spin-nemati…
Magnetic structure in U(Ru0.92Rh0.08)2Si2 single crystal studied by neutron diffraction in static magnetic fields up to 24 T
K. Prokes, M. Bartkowiak, O. Rivin +6
We report the high-field induced magnetic phase in single crystal of U(Ru0.92Rh0.08)2Si2. Our neutron study combined with high-field magnetization, shows that the magnetic phase ab…
Deviations from the extended London model at high magnetic fields in YBaCuO
E. Campillo, M. Bartkowiak, R. Riyat +8
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.…
Magnetization process of atacamite: a case of weakly coupled sawtooth chains
L. Heinze, H. O. Jeschke, I. I. Mazin +17
We present a combined experimental and theoretical study of the mineral atacamite CuCl(OH). Density functional theory yields a Hamiltonian describing anisotropic sawtooth c…
Magnetoelastic and structural properties of azurite Cu3(CO3)2(OH)2 from neutron scattering and muon spin rotation
M. C. R. Gibson, K. C. Rule, A. U. B. Wolter +12
Azurite, Cu3(CO3)2(OH)2, has been considered an ideal example of a one-dimensional (1D) diamond chain antiferromagnet. Early studies of this material imply the presence of an order…
Coupling of frustrated Ising spins to magnetic cycloid in multiferroic TbMnO3
O. Prokhnenko, R. Feyerherm, M. Mostovoy +5
We report on diffraction measurements on multiferroic TbMnO3 which demonstrate that the Tb- and Mn-magnetic orders are coupled below the ferroelectric transition TFE = 28 K. For T…
Helical Spin Dynamics in Commensurate Magnets: a Study on Brochantite, CuSO(OH)
S. E. Nikitin, Tao Xie, A. Gazizulina +8
We report the direct observation of a commensurate-ordered antiferromagnetic (AFM) state but incommensurate helical spin dynamics in the natural mineral brochantite CuSO(OH…