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Bannenberg, L.J. (author), Sadykov, R. (author), Dalgliesh, R. M. (author), Goodway, C. (author), Schlagel, D. L. (author), Lograsso, T. A. (author), Falus, P. (author), Lelièvre-Berna, E. (author), Pappas, C. (author)The archetype cubic chiral magnet MnSi is home to some of the most fascinating states in condensed matter, such as skyrmions and a non-Fermi-liquid behavior in conjunction with a topological Hall effect under hydrostatic pressure. Using small angle neutron scattering, we study the evolution of the helimagnetic, conical, and skyrmionic...journal article 2019
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Sadykov, Ravil (author), Pappas, C. (author), Bannenberg, L.J. (author), Dalgliesh, Robert M. (author), Falus, Péter (author), Goodway, Christopher (author), Lelièvre-Berna, Eddy (author)We have developed and realised a compact high-pressure clamp cell of the piston-cylinder type for Small Angle Neutron Scattering (SANS) and Neutron Spin Echo (NSE) spectroscopy measurements. The cell can pressurise φ5 mm samples up to 1.5 GPa. It is non-magnetic, produces a sufficiently low and flat SANS background with a relatively good...journal article 2018
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Pappas, C. (author), Bannenberg, L.J. (author), Lelièvre-Berna, E. (author), Qian, F. (author), Dewhurst, C. D. (author), Dalgliesh, R. M. (author), Schlagel, D. L. (author), Lograsso, T. A. (author), Falus, P (author)The reference chiral helimagnet MnSi is the first system where Skyrmion lattice correlations have been reported. At a zero magnetic field the transition at TC to the helimagnetic state is of first order. Above TC, in a region dominated by precursor phenomena, neutron scattering shows the buildup of strong chiral fluctuating correlations over...journal article 2017
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Bannenberg, L.J. (author), Kakurai, K. (author), Qian, F. (author), Lelièvre-Berna, E. (author), Dewhurst, C. D. (author), Onose, Y. (author), Endoh, Y. (author), Tokura, Y (author), Pappas, C. (author)Small angle neutron scattering measurements on a bulk single crystal of the doped chiral magnet Fe1-xCoxSi with x=0.3 reveal a pronounced effect of the magnetic history and cooling rates on the magnetic phase diagram. The extracted phase diagrams are qualitatively different for zero and field cooling and reveal a metastable skyrmion lattice...journal article 2016