Low-dimensional magnetism of spin-½ chain systems of α- and β-TeVO4: A comparative study

We present a comparative study of the low-dimensional compounds α- and β-TeVO4. Our data clearly show that the change in the local coordination geometry of V4+ ions between α- and β-TeVO4 leads to drastic differences in their magnetic properties. Despite sharing the same crystal structure, the two compounds manifest different magnetic exchange topologies. Both compounds exhibit a transition from ferro- to anti-ferromagnetic correlations with decreasing temperature. This effect, however, is driven by different mechanisms in the two compounds. In addition, dimensional crossover is found in β-TeVO4.

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