Andrew Boothroyd: Publications

Textbook

Principles of Neutron Scattering from Condensed Matter

Published by Oxford University Press in July 2020

The J_{eff}=1/2 insulator Sr3Ir2O7 studied by means of angle-resolved photoemission spectroscopy

(2012)

Authors:

BM Wojek, MH Berntsen, S Boseggia, AT Boothroyd, D Prabhakaran, DF McMorrow, HM Rønnow, J Chang, O Tjernberg

Erratum: Electric field control of chiral magnetic domains in the high-temperature multiferroic CuO [Phys. Rev. B 85, 134428 (2012)]

Physical Review B American Physical Society (APS) 86:1 (2012) 019905

Authors:

P Babkevich, A Poole, RD Johnson, B Roessli, D Prabhakaran, AT Boothroyd

On the magnetic structure of Sr3Ir2O7: an x-ray resonant scattering study

(2012)

Authors:

S Boseggia, R Springell, HC Walker, AT Boothroyd, D Prabhakaran, SP Collins, DF McMorrow

Advances in the understanding of multiferroics through soft X-ray diffraction

European Physical Journal: Special Topics 208:1 (2012) 99-106

Authors:

TAW Beale, SB Wilkins, RD Johnson, D Prabhakaran, AT Boothroyd, P Steadman, SS Dhesi, PD Hatton

Abstract:

The magneto-electric multiferroic TbMn 2O 5 has a complex magnetic structure in three different magnetically ordered phases. We have determined the nature of the induced magnetic order on the oxygen sites in the commensurate magnetic phase through full linear X-ray polarisation analysis at the oxygen K edge. This has been achieved rotating the linear polarisation of the incident beam at the source, and using multilayers to analyse the polarisation state of the scattered X-ray beam. We have confirmed that the anisotropy of the magnetic scattering at the oxygen edge is consistent with the anisotropy of the manganese magnetic structure. © 2012 EDP Sciences, Springer-Verlag.

Dynamical matrix diagonalization for the calculation of dispersive excitations.

J Phys Condens Matter 24:21 (2012) 213201

Authors:

Martin Rotter, Manh Duc Le, Andrew T Boothroyd, Jesus Angel Blanco

Abstract:

The solid state exhibits a fascinating variety of phases, which can be stabilized by the variation of external parameters such as temperature, magnetic field and pressure. Until recently, numerical analysis of magnetic and/or orbital phases with collective excitations on a periodic lattice tended to be done on a case-by-case basis. Nowadays dynamical matrix diagonalization (DMD) has become an important and powerful standard method for the calculation of dispersive modes. The application of DMD to the interpretation of inelastic neutron scattering (INS) data on dispersive magnetic excitations is reviewed. A methodical survey of calculations employing spin-orbit and intermediate coupling schemes is illustrated by examples. These are taken from recent work on rare earth, actinide and transition metal compounds and demonstrate the application of the formalism developed.

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