Abstract
We demonstrate that pressure-induced magnetic phase transitions can be detected by optical second harmonic generation (SHG) measurements in diamond anvil cells and show that the transition from an acentric to a centrosymmetric magnetic structure occurs in Cr2O3 at 10(1) GPa. The pressure dependence of the Néel temperature, dTN/dP = −1.0(5) K/GPa from our SHG measurements, which differs significantly from earlier results where dTN/dP ranged from −16 K/GPa to +15 K/GPa.
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