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Ultrafast Resonant Soft X-ray Scattering in Manganites: Direct Measurement of Time-dependent Orbital Order

Optica Publishing Group (2010) me48

Authors:

H Ehrke, RI Tobey, S Wall, SA Cavill, D Prabhakaran, AT Boothroyd, M Gensch, P Reutler, A Revcolevschi, SS Dhesi, A Cavalleri
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ChemInform Abstract: Magnetic Coulomb Phase in the Spin Ice Ho2Ti2O7.

ChemInform Wiley 40:51 (2009) no-no

Authors:

T Fennell, PP Deen, AR Wildes, K Schmalzl, D Prabhakaran, AT Boothroyd, RJ Aldus, DF McMorrow, ST Bramwell
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Preface: Symposium HH

Materials Research Society Symposium Proceedings 1184 (2009)

Authors:

F Bridges, DA Keen, I Levin, T Proffen

Nature of the magnetic order and origin of induced ferroelectricity in TbMnO3.

Phys Rev Lett 103:20 (2009) 207602

Authors:

SB Wilkins, TR Forrest, TAW Beale, SR Bland, HC Walker, D Mannix, F Yakhou, D Prabhakaran, AT Boothroyd, JP Hill, PD Hatton, DF McMorrow

Abstract:

The magnetic structures which endow TbMnO(3) with its multiferroic properties have been reassessed on the basis of a comprehensive soft x-ray resonant scattering (XRS) study. The selectivity of XRS facilitated separation of the various contributions (Mn L(2) edge, Mn 3d moments; Tb M(4) edge, Tb 4f moments), while its variation with azimuth provided information on the moment direction of distinct Fourier components. When the data are combined with a detailed group theory analysis, a new picture emerges of the ferroelectric transition at 28 K. Instead of being driven by the transition from a collinear to a noncollinear magnetic structure, as has previously been supposed, it is shown to occur between two noncollinear structures.
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Nature of the magnetic order and origin of induced ferroelectricity in TbMnO3

Physical Review Letters 103:20 (2009)

Authors:

SB Wilkins, TR Forrest, TAW Beale, SR Bland, HC Walker, D Mannix, F Yakhou, D Prabhakaran, AT Boothroyd, JP Hill, PD Hatton, DF McMorrow

Abstract:

The magnetic structures which endow TbMnO3 with its multiferroic properties have been reassessed on the basis of a comprehensive soft x-ray resonant scattering (XRS) study. The selectivity of XRS facilitated separation of the various contributions (Mn L2 edge, Mn 3d moments; Tb M4 edge, Tb 4f moments), while its variation with azimuth provided information on the moment direction of distinct Fourier components. When the data are combined with a detailed group theory analysis, a new picture emerges of the ferroelectric transition at 28 K. Instead of being driven by the transition from a collinear to a noncollinear magnetic structure, as has previously been supposed, it is shown to occur between two noncollinear structures. © 2009 The American Physical Society.
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