Abstract

The magnetic susceptibility and the electron spin resonance in the X-band of the transition metal oxide compound MgVO3 are reported. We show that this compound, made of weakly coupled infinite chains of VO5 pyramids, behaves as a S=1/2 one-dimensional Heisenberg antiferromagnet. From the ESR and magnetic experiments we deduce the Neel temperature K, the in-chain coupling constant K and the g-factor values gx=gz=1.972(2), gy=1.946(1) for V4+ ions in MgVO3.

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