X-ray and neutron scattering

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Coupling of the local defect and magnetic structure of wüstite Fe1−xO

Physical Review B American Physical Society (APS) 88:13 (2013) 134418

Authors:

Paul J Saines, Matthew G Tucker, David A Keen, Anthony K Cheetham, Andrew L Goodwin
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Crystal-field states of Pr3+ in the candidate quantum spin ice Pr2Sn2O7

Physical Review B - Condensed Matter and Materials Physics 88:10 (2013)

Authors:

AJ Princep, D Prabhakaran, AT Boothroyd, DT Adroja

Abstract:

Neutron time-of-flight spectroscopy has been employed to study the crystal-field splitting of Pr3+ in the pyrochlore stannate Pr 2Sn2O7. The crystal field has been parameterized from a profile fit to the observed neutron spectrum. The single-ion ground state is a well-isolated non-Kramers doublet of Γ3+ symmetry with a large Ising-like anisotropy, χzz/ χ⊥≈60 at 10 K, but with a significant admixture of terms |MJ≠±J, which can give rise to quantum zero-point fluctuations. This magnetic state satisfies the requirements for quantum spin-ice behavior. © 2013 American Physical Society.
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Systematic and Controllable Negative, Zero, and Positive Thermal Expansion in Cubic Zr1–x Sn x Mo2O8

Journal of the American Chemical Society American Chemical Society (ACS) 135:34 (2013) 12849-12856

Authors:

Sarah E Tallentire, Felicity Child, Ian Fall, Liana Vella-Zarb, Ivana Radosavljević Evans, Matthew G Tucker, David A Keen, Claire Wilson, John SO Evans
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The Hour-Glass Magnetic Spectrum Arising from a Striped, Cluster Spin Glass Ground State in La1.75Sr0.25CoO4

(2013)

Authors:

SM Gaw, EC Andrade, M Vojta, CD Frost, DT Adroja, D Prabhakaran, AT Boothroyd
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Joint X‑ray/Neutron Crystallographic Study of HIV‑1 Protease with Clinical Inhibitor Amprenavir: Insights for Drug Design

Journal of Medicinal Chemistry American Chemical Society (ACS) 56:13 (2013) 5631-5635

Authors:

Irene T Weber, Mary Jo Waltman, Marat Mustyakimov, Matthew P Blakeley, David A Keen, Arun K Ghosh, Paul Langan, Andrey Y Kovalevsky
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