X-ray and neutron scattering

Research group

Research theme

Sub department

About

Structural and superionic properties of Ag+-rich ternary phases within the AgI?MI2 systems

Journal of Physics Condensed Matter IOP Publishing 14:49 (2002) 13579

Authors:

S Hull, DA Keen, P Berastegui
More details from the publisher

Spin reorientation transition in the incommensurate stripe-ordered phase of La3/2Sr1/2NiO4

Physical Review B - Condensed Matter and Materials Physics 66:21 (2002) 2124051-2124054

Authors:

PG Freeman, AT Boothroyd, D Prabhakaran, D González, M Enderle

Abstract:

The spin ordering of La3/2Sr1/2NiO4 was investigated by magnetization measurements and by unpolarized and polarized-neutron diffraction. Spin ordering with an incommensurability ε≈0.445 is observed below TSO∼80 K. On cooling, a spin reorientation is observed at 57±1 K, with the spin axes rotating from 52° ±4° to 780°±3°.
More details from the publisher
More details
Details from ArXiV

An investigation of the magnetic structure of PrO2

APPL PHYS A-MATER 74 (2002) S1773-S1775

Authors:

CH Gardiner, AT Boothroyd, SJS Lister, MJ McKelvy, S Hull, BH Larsen

Abstract:

We present a neutron-diffraction study of the crystal structure and magnetic ordering of PrO2. The magnetic moment of the Pr4+ ion is determined from separate single-crystal and powder measurements, and both values are found to agree with a previous powder study. Our powder data reveal a new aspect to the magnetic structure: a doubling of the magnetic unit cell along one crystal axis.
More details from the publisher

Dispersive magnetic excitations in non-superconducting PrBa2Cu3O6+x (x approximate to 0.93)

APPL PHYS A-MATER 74 (2002) S898-S900

Authors:

CH Gardiner, SJS Lister, AT Boothroyd, NH Andersen, AA Zhokhov, A Stunault, A Hiess

Abstract:

We report preliminary results of a neutron inelastic scattering study of the magnetic excitations in single-crystal PrBa2Cu3O6+x (x approximate to 0.93). The measurements probe (i) the dispersion of the low-energy crystal field levels of the Pr ion in the low-temperature AFIII magnetic phase and (ii) the Cu optic spin wave mode gap in the AFI magnetic phase. We compare the results with previous measurements made when the same crystal was in an oxygen-deficient state, and thus establish the effect of hole doping on the magnetic excitations.
More details from the publisher

The magnetic state of Yb in Kondo-lattice YbNi2B2C

(2002)

Authors:

AT Boothroyd, JP Barratt, P Bonville, PC Canfield, A Murani, AR Wildes, RI Bewley
More details from the publisher