Figure 6: High-pressure evolution of the Néel temperature of CuO.
From: Room-temperature spin-spiral multiferroicity in high-pressure cupric oxide
Pressure dependence of the Néel temperature of CuO. Experimental data measured up to 1.8 GPa are compared with theoretical ones deduced from an analytical expression developed for S=1/2 quasi-1D Heisenberg antiferromagnets22. Three parameterizations are used, the original one with c=0.233 and α=2.6 (param.1) and two modified forms, with c=0.284 and α=2.6 (param.2) and with c=0.233 and α=8.4 (param.3). The black dash line evidences that TN is reaching RT at about 20 GPa (from both param. 2 and 3).
