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Magnetic Studies of Polycrystalline and Single-Crystal NaxCoO2
D. Prabhakaran, A. T. Boothroyd, R. Coldea +2
We have investigated the preparation and bulk magnetic properties of NaxCoO2 in the range 0.5<x<0.95, including those for single crystals grown by the floating-zone method in an im…
Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering
A. T. Boothroyd, R. Coldea, D. A. Tennant +3
We present neutron scattering spectra taken from a single crystal of Na0.75CoO2, the precursor to a novel cobalt-oxide superconductor. The data contain a prominent inelastic signal…
Magnetization of Charge-ordered la(2-x)sr(x)nio(4+delta)
P. G. Freeman, A. T. Boothroyd, D. Prabhakaran +1
We report magnetization measurements on La(2-x)Sr(x)NiO(4+ delta) single crystals, with 0 < x < 0.5. Glassy behaviour associated with the formation of spin-charge stripes, and a se…
Cooperative Jahn-Teller Distortion in PrO2
C. H. Gardiner, A. T. Boothroyd, P. Pattison +3
We report neutron diffraction data on single crystal PrO2 which reveal a cooperative Jahn-Teller distortion at TD = 120 +/- 2 K. Below this temperature an internal distortion of th…
Magnetic excitations in LaSrCoO
L. M. Helme, A. T. Boothroyd, D. Prabhakaran +3
We report magnetization and neutron scattering measurements of the half-doped compound LaSrCoO, which exhibits a checkerboard pattern of charge ordering below ~…
Spin correlations among the charge carriers in an ordered stripe phase
A. T. Boothroyd, P. G. Freeman, D. Prabhakaran +4
We have observed a diffuse component to the low-energy magnetic excitation spectrum of stripe-ordered La5/3Sr1/3NiO4 probed by neutron inelastic scattering. The diffuse scattering…