Dispersive magnetic excitations in the S=1 antiferromagnet Ba3Mn2O8

We present powder inelastic neutron scattering measurements of the $S=1$ dimerized antiferromagnet Ba$_3$Mn$_2$O$_8$. The $T=1.4$~K~magnetic spectrum exhibits a spin-gap of $\Delta = 0.9$~meV and a dispersive spectrum with a bandwidth of approximately $1.74$~meV. Comparison to coupled dimer models d...

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Veröffentlicht in:	Physical review. B, Condensed matter Condensed matter, 2008-01, Vol.77 (13)
Hauptverfasser:	Stone, Matthew B, Lumsden, Mark D, Qiu, Y., Samulon, Eric C, Batista, C. D., Fisher, Ian R
Format:	Artikel
Sprache:	eng
Schlagworte:	ANTIFERROMAGNETIC MATERIALS DIMERS MATERIALS SCIENCE NEUTRONS SCATTERING VECTORS
Online-Zugang:	Volltext
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