Abstract
The magnetic susceptibility and the electron spin resonance in the X-band of the transition metal oxide compound MgVO 3 are reported. We show that this compound, made of weakly coupled infinite chains of VO 5 pyramids, behaves as a S = 1/2 one-dimensional Heisenberg antiferromagnet. From the ESR and magnetic experiments we deduce the Neel temperature T N = 5.2 ± 0.5 K, the in-chain coupling constant J/k = 100±5 K and the g-factor values g x = g z = 1.972(2), g y = 1.946(1) for V 4+ ions in MgVO 3 .
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