Andrew Boothroyd: Publications

Textbook

Principles of Neutron Scattering from Condensed Matter

Published by 91̽�� University Press in July 2020

Phonon dispersion relations in PrBa₂Cu₃O_6+x (x≈0.2) - art. no. 092302

PHYSICAL REVIEW B 69:9 (2004) ARTN 092302

Authors:

CH Gardiner, AT Boothroyd, BH Larsen, W Reichardt, AA Zhokhov, NH Andersen, SJS Lister, AR Wildes

Resonant soft energy X-ray diffraction of charge, spin and orbital ordering

ADV SOLID STATE PHYS 44 (2004) 467-478

Authors:

PD Hatton, SB Wilkins, TAW Beale, T Johal, P Bencok, D Prabhakaran, AT Boothroyd

Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering

(2003)

Authors:

AT Boothroyd, R Coldea, DA Tennant, D Prabhakaran, LM Helme, CD Frost

Magnetic Studies of Polycrystalline and Single-Crystal NaxCoO2

ArXiv cond-mat/0312493 (2003)

Authors:

D Prabhakaran, AT Boothroyd, R Coldea, LM Helme, DA Tennant

Abstract:

We have investigated the preparation and bulk magnetic properties of NaxCoO2 in the range 0.5

A μ⁺SR study of the rare earth antiferromagnet PrO2

Journal of Physics Condensed Matter 15:49 (2003) 8407-8415

Authors:

T Lancaster, SJ Blundell, FL Pratt, CH Gardiner, W Hayes, AT Boothroyd

Abstract:

We present zero-field muon spin relaxation (μ+SR) measurements on the rare earth antiferromagnet PrO2. Oscillations in the time dependence of the muon polarization, characteristic of a quasistatic magnetic field at two distinct muon sites, are observed below TN, along with relaxation dominated by the magnitude of the local field. Candidate muon sites in the material are suggested on the strength of dipole field calculations. Relaxation above TN allows a prediction of the quasielastic neutron scattering linewidth, which is discussed in terms of a simple model of magnetoelastic relaxation involving a crystal field state at an energy Δ above the ground level. The obtained value of Δ may be taken as an approximate estimate of the splitting of the Γ8 ground state of Pr4+ in the distorted fluorite structure.

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