Magnetic phase diagrams of the Kagome staircase compound Co3V2O8

Details Magnetic phase diagrams of the Kagome staircase compound Co3V2O8 Magnetic phase diagrams of the Kagome staircase compound Co3V2O8

2007-10-04

arxiv.org/abs/0710.1009v1

Physica B 403, 1487 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

Proceedings of the 2007 Conference on Strongly Correlated Electron Systems, 2 pages, 2 figures

Scientific paper

10.1016/j.physb.2007.10.334

At zero magnetic field, a series of five phase transitions occur in Co3V2O8. The Neel temperature, TN=11.4 K, is followed by four additional phase changes at T1=8.9 K, T2=7.0 K, T3=6.9 K, and T4=6.2 K. The different phases are distinguished by the commensurability of the b-component of its spin density wave vector. We investigate the stability of these various phases under magnetic fields through dielectric constant and magnetic susceptibility anomalies. The field-temperature phase diagram of Co3V2O8 is completely resolved. The complexity of the phase diagram results from the competition of different magnetic states with almost equal ground state energies due to competing exchange interactions and frustration.

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