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A statistical model approximation for perovskite solid-solutions: A Raman study of lead-zirconate-titanate single crystal

JOURNAL OF APPLIED PHYSICS 113:17 (2013) ARTN 174104

Authors:

J Frantti, Y Fujioka, A Puretzky, Y Xie, Z-G Ye, AM Glazer
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Dynamical matrix diagonalization for the calculation of dispersive excitations (vol 24, 213201, 2012)

JOURNAL OF PHYSICS-CONDENSED MATTER 25:32 (2013) ARTN 329501

Authors:

Martin Rotter, Manh Duc Le, Andrew T Boothroyd, Jesus Angel Blanco
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Splitting of the transition to the antiferroelectric state in PbZr0.95Ti0.05O3 into polar and antiferrodistortive components

PHYSICAL REVIEW B 88:9 (2013) ARTN 094107

Authors:

F Cordero, F Craciun, F Trequattrini, C Galassi, PA Thomas, DS Keeble, AM Glazer
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The first paper by WL Bragg - what and when?

CRYSTALLOGRAPHY REVIEWS 19:3 (2013) 117-124
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Ground state in a half-doped manganite distinguished by neutron spectroscopy

Physical Review Letters 109:23 (2012)

Authors:

GE Johnstone, TG Perring, O Sikora, D Prabhakaran, AT Boothroyd

Abstract:

We have measured the spin-wave spectrum of the half-doped bilayer manganite Pr(Ca,Sr)2Mn2O7 in its spin, charge, and orbital ordered phase. The measurements, which extend throughout the Brillouin zone and cover the entire one-magnon spectrum, are compared critically with spin-wave calculations for different models of the electronic ground state. The data are described very well by the Goodenough model, which has weakly interacting ferromagnetic zig-zag chains in the CE-type arrangement. A model that allows ferromagnetic dimers to form within the zigzags is inconsistent with the data. The analysis conclusively rules out the strongly bound dimer (Zener polaron) model. © 2012 American Physical Society.
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