X-ray and neutron scattering

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Evidence of Magnetic Correlations Among the Charge Stripe Electrons of Charge-Stripe Ordered La2NiO4.11

(2011)

Authors:

PG Freeman, SM Hayden, RA Mole, M Enderle, D Prabhakaran, AT Boothroyd
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Analysis of local chemical and structural inhomogeneities in FeySe1−xTex single crystals

Applied Physics Letters AIP Publishing 99:19 (2011) 192504

Authors:

SC Speller, TB Britton, G Hughes, S Lozano-Perez, AT Boothroyd, E Pomjakushina, K Conder, CRM Grovenor
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Femtoscale magnetically induced lattice distortions in multiferroic TbMnO3

(2011)

Authors:

HC Walker, F Fabrizi, L Paolasini, F de Bergevin, J Herrero-Martin, AT Boothroyd, D Prabhakaran, DF McMorrow
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Neutron powder diffraction refinement of PbZr(1 - x)Ti(x)O3.

Acta Crystallogr B 67:Pt 5 (2011) 386-398

Authors:

N Zhang, H Yokota, AM Glazer, PA Thomas

Abstract:

Rietveld refinement of different structural models using neutron diffraction data for a series of powders of lead zirconate titanate, PbZr(1 - x)Ti(x)O(3) (PZT), is described. It is found that at all the compositions and temperatures studied the best results include contributions from more than one phase in order to fit the data. Consequently a new phase diagram is proposed.
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Cu3Nb2O8: A multiferroic with chiral coupling to the crystal structure

Physical Review Letters 107:13 (2011)

Authors:

RD Johnson, S Nair, LC Chapon, A Bombardi, C Vecchini, D Prabhakaran, AT Boothroyd, PG Radaelli

Abstract:

By combining bulk properties, neutron diffraction, and nonresonant x-ray diffraction measurements, we demonstrate that the new multiferroic Cu 3Nb2O8 becomes polar simultaneously with the appearance of generalized helicoidal magnetic ordering. The electrical polarization is oriented perpendicularly to the common plane of rotation of the spins-an observation that cannot be reconciled with the conventional theory developed for cycloidal multiferroics. Our results are consistent with coupling between a macroscopic structural rotation, which is allowed in the paramagnetic group, and magnetically induced structural chirality. © 2011 American Physical Society.
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