Adaptation of the Bridgman anvil cell to liquid pressure mediums

Abstract

The advantage of Bridgman anvil pressure cells is their wide pressure range and the large number of wires which can be introduced into the pressure chamber. In these pressure cells soft solid pressure mediums like steatite are used. We have succeeded in adapting the Bridgman cell to liquid pressure mediums. With this breakthrough it is now possible to measure in very good hydrostatic pressure conditions up to 7 GPa, which is about twice the pressure attainable in piston-cylinder cells. The pressure gradient in the cell, estimated from the superconducting transition width of lead, is reduced by a factor of five in the liquid medium with respect to steatite. By the use of non-magnetic materials for the anvils and the clamp and due to the small dimensions of the latter, our device is specially suitable for magneto-transport measurements in dilution fridges. This pressure cell has been developed to measure very fragile and brittle samples like organic conductors. Resistivity measurements of (TMTTF)2BF4 performed in a solid and liquid pressure medium demonstrate the necessity of hydrostatic pressure conditions for the study of organic conductors at high pressures.

arXiv comment12 pages, 7 figures. Published in Review of Scientific Instruments

References in corpus (1)

• Signatures of valence fluctuations in CeCu2Si2 under high pressure

Cited by in corpus (7)

• Heavy Fermion superconductor CeCu${}_2$Si${}_2$ under high pressure: multiprobing the valence crossover
• The Dominant Role of Critical Valence Fluctuations on High $T_{\mathrm{c}}$ Superconductivity in Heavy Fermions
• Pressure cycle of superconducting Cs0.8Fe2Se2: a transport study
• Pressure Collapse of the Magnetic Ordering in MnSi via Thermal Expansion
• Absence of magnetic phase separation in MnSi under pressure
• Coincidence of magnetic and valence quantum critical points in CeRhIn5 under pressure
• High pressure investigation of superconducting signatures in CeCu${}_2$Si${}_2$ : ac- magnetic susceptibility and heat capacity, resistivity and thermopower