MnO spin-wave dispersion curves from neutron powder diffraction

Andrew L. Goodwin; Martin T. Dove; Matthew G. Tucker; David A. Keen

doi:10.1103/PhysRevB.75.075423

MnO spin-wave dispersion curves from neutron powder diffraction

Andrew L. Goodwin, Martin T. Dove, Matthew G. Tucker, David A. Keen

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We describe a model-independent approach for the extraction of spin-wave dispersion curves from powder neutron total scattering data. Our approach is based on a statistical analysis of real-space spin configurations to calculate spin-dynamical quantities. The RMCPROFILE implementation of the reverse Monte Carlo refinement process is used to generate a large ensemble of supercell spin configurations from MnO powder diffraction data collected at 100 K. Our analysis of these configurations gives spin-wave dispersion curves for MnO that agree well with those determined independently using neutron triple-axis spectroscopic techniques.

Original language	English
Article number	075423
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	75
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.75.075423
State	Published - Feb 26 2007
Externally published	Yes

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10.1103/PhysRevB.75.075423

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AU - Goodwin, Andrew L.

AU - Dove, Martin T.

AU - Tucker, Matthew G.

AU - Keen, David A.

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Y1 - 2007/2/26

N2 - We describe a model-independent approach for the extraction of spin-wave dispersion curves from powder neutron total scattering data. Our approach is based on a statistical analysis of real-space spin configurations to calculate spin-dynamical quantities. The RMCPROFILE implementation of the reverse Monte Carlo refinement process is used to generate a large ensemble of supercell spin configurations from MnO powder diffraction data collected at 100 K. Our analysis of these configurations gives spin-wave dispersion curves for MnO that agree well with those determined independently using neutron triple-axis spectroscopic techniques.

AB - We describe a model-independent approach for the extraction of spin-wave dispersion curves from powder neutron total scattering data. Our approach is based on a statistical analysis of real-space spin configurations to calculate spin-dynamical quantities. The RMCPROFILE implementation of the reverse Monte Carlo refinement process is used to generate a large ensemble of supercell spin configurations from MnO powder diffraction data collected at 100 K. Our analysis of these configurations gives spin-wave dispersion curves for MnO that agree well with those determined independently using neutron triple-axis spectroscopic techniques.

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MnO spin-wave dispersion curves from neutron powder diffraction

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