Miniature diamond anvil cell: Incorporating a new design for anvil alignment

Abstract

A miniature diamond anvil cell (DAC) of overall dimensions φ10×24 mm made of nonmagnetic NiCrAl alloy is described. A new design permits the alignment of anvil flats as perfectly as in traditional DACs. A lever-arm assembly and a fiber-optical system for the cell are described. Two example of experimental results obtained with the cell are given, namely the pressure dependence of the refractive index of diamond and the pressure-induced shifts in the photoluminescence peaks of a quantum well sample. A maximum pressure of 110 GPa was reached with beveled anvils.

Effect of pressure on the polarized infrared optical response of the quasi-one-dimensional conductorLaTiO3.41

“…This is justified because n dia is known to change only very little with pressure ͑⌬n dia / ⌬P = −0.00075/ GPa͒. 18,19 Variations in synchrotron source intensity were taken into account by applying additional normalization procedures. Strain-induced depolarization in the diamond anvil is considered negligible in the pressure range covered in the present experiment.…”

High-Pressure Single-Crystal Techniques

“…Another method to transmit large loads through the tilt alignment mechanism, is to use rotating wedges (Fig. 15c) as realized in the miniature cells by Eremets and Timofeev (1992) and . For this method a cylinder divided by a plane tilted at some angle α and the rotation of one part relative to the other enables tilt adjustments from 0° to a maximum angle of 2α.…”

Pressure-induced metallization and structural phase transition of the Mott-Hubbard insulator TiOBr

“…The reflectance spectra were calculated according to R s-d ͑͒ = R dia I s-dia ͑͒ / I dia ͑͒, where R dia was estimated from the refractive index of diamond n dia to 0.167 and assumed to be independent of pressure. 17,18 Pressure-dependent x-ray powder diffraction measurements at room temperature were carried out with monochromatic radiation ͑ = 0.4128 Å͒ at beamline ID09A of the European Synchrotron Radiation Facility at Grenoble. Crystals were ground and placed into a DAC for pressure generation.…”