Magnetic Properties of the low dimensional spin system (VO)2P2O7: ESR and susceptibility
Abstract
Experimental results on magnetic resonance (ESR) and magnetic susceptibility are given for single crystalline (VO)2P2O7. The crystal growth procedure is briefly discussed. The susceptibility is interpreted numerically using a model with alternating spin chains. We determine J=51 K and δ=0.2. Furthermore we find a spin gap of ≈ 6meV from our ESR measurements. Using elastic constants no indication of a phase transition forcing the dimerization is seen below 300 K.
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