Nd3+-doped yttrium aluminum garnet crystal as a near-infrared pressure sensor for diamond anvil cells

Pressure-induced shift-of various luminescence lines of Nd3+-doped yttrium aluminum garnet crystal in the pressure range of 0-120 kbars and temperatures between 10 and 300 K is reported. Spectral positions of all these lines in the region of 900-960 nm shift linearly towards lower energies with the pressure coefficient values from -0.01 to -0.99 cm(-1)/kbar in the examined pressure range. Two of these lines have similar pressure coefficients than those of the R lines of Cr3+ in ruby. Therefore, they can be readily used for pressure calibration in diamond anvil. cells. (c) 2006 American institute of Physics.