Experimental evidence for a spin-Peierls-transition in α'-NaV2O5
M. Weiden, R. Hauptmann, C. Geibel, F. Steglich, M. Fischer, P. Lemmens, G. Güntherodt
Abstract
We present the first measurements of magnetisation and Raman light scattering on α'-NaV2O5 single crystals. Below 34 K, we observe a pronounced isotropic decrease of the susceptibility indicating the opening of a spin gap. The transition temperature is slightly field dependent. Raman experiments reveal a crystallographic distortion at the transition. Our results clearly establish α'-NaV2O5 to be the second inorganic spin-Peierls system.
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