Experimental evidence for a spin-Peierls-transition in $\alpha'-NaV_2O_5$

C. Geibel; F. Steglich (Technische Physik; Germany); G. G\"untherodt (Physikalisches Institut; M. Fischer; M. Weiden; P. Lemmens; R. Hauptmann; RWTH Aachen; TH Darmstadt

arxiv: cond-mat/9703052 · v1 · pith:XIVNVLOKnew · submitted 1997-03-05 · ❄️ cond-mat.str-el

Experimental evidence for a spin-Peierls-transition in α'-NaV₂O₅

M. Weiden , R. Hauptmann , C. Geibel , F. Steglich (Technische Physik , TH Darmstadt , Germany) , M. Fischer , P. Lemmens

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G. G\"untherodt (Physikalisches Institut RWTH Aachen

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keywords alpharamantransitionbelowclearlycrystallographiccrystalsdecrease

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We present the first measurements of magnetisation and Raman light scattering on $\alpha'-NaV_2O_5$ 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 $\alpha'-NaV_2O_5$ to be the second inorganic spin-Peierls system.

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Experimental evidence for a spin-Peierls-transition in α'-NaV₂O₅

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