Figure 4From: PPMS-based set-up for Raman and luminescence spectroscopy at high magnetic field, high pressure and low temperature Exemplary measurements showing (a) the ortho-to-para conversion of molecular hydrogen at ∼20 K at applied magnetic field (9 T) and high pressure (27 GPa) and (b) the hydrogen vibron Q 1 (1) at 5 K and 300 K in zero and 9 T magnetic field. Back to article page