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The effect of externally applied pressure on the magnetic behavior of Cu2Te2O5(BrxCl{1-x})2

S. J. Crowe·M. R. Lees·D. McK. Paul·R. I. Bewley·J. W. Taylor·G. McIntyre·O. Zaharko·H. Berger
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Abstract

The effect of externally applied pressure on the magnetic behavior of Cu2Te2O5(BrxCl{1-x})2 with x = 0, 0.73 and 1, is investigated by a combination of magnetic susceptibility, neutron diffraction and neutron inelastic scattering measurements. The magnetic transition temperatures of the x = 0 and 0.73 compositions are observed to increase linearly with increasing pressure at a rate of 0.23(2) K/kbar and 0.04(1) K/kbar respectively. However, the bromide shows contrasting behavior with a large suppression of the transition temperature under pressure, at a rate of -0.95(9) K/kbar. In neutron inelastic scattering measurements of Cu2Te2O5Br2 under pressure only a small change to the ambient pressure magnetic excitations were observed. A peak in the density of states was seen to shift from ~5 meV in ambient pressure to ~6 meV under an applied pressure of 11.3 kbar, which was associated with an increase in the overall magnetic coupling strength.

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S. J. Crowe, M. R. Lees, D. McK. Paul, R. I. Bewley, J. W. Taylor, G. McIntyre, O. Zaharko, H. Berger. 2006-01-02. The effect of externally applied pressure on the magnetic behavior of Cu2Te2O5(BrxCl{1-x})2. https://doi.org/10.1103/physrevb.73.144410

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