Magnetic properties of the coupled ladder system MgV$_2$O$_5$

Details Magnetic properties of the coupled ladder system MgV$_2$O$_5$ Magnetic properties of the coupled ladder system MgV$_2$O$_5$

1998-02-03

arxiv.org/abs/cond-mat/9802029v1

Phys. Rev. B 57, R5005 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

Revtex, 4 pages, figures 2, 4 and 5 available on request. To appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.57.5005

We present magnetic susceptibility measurements on MgV$_2$O$_5$, a compound in which the vanadium oxide planes have the same topology as in CaV$_2$O$_5$. The most striking property is that there is an energy gap of about 15 K, much smaller than in CaV$_2$O$_5$, where the values reported are of the order of 500 K. We show that this may be understood naturally in terms of the phase diagram of the frustrated, coupled ladder system. This analysis leads to the prediction that MgV$_2$O$_5$ should have incommensurate dynamic spin fluctuations.

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