Development and Application of Piston-cylinder Type Clamp Cells for Neutron Diffraction

Abstract

Effects of pressure on the physical properties are very important for understanding highly correlated electron systems, in which pressure-induced attractive phenomena such as superconductivity have been observed. In this article, the characteristic features of various materials and pressure transmitting media for use of piston-cylinder type clamp cells are reported. Both CuBe and hybrid CuBe/NiCrAl piston-cylinder-type high-pressure clamp cells were designed for low-temperature neutron diffraction measurements. We also introduce, as the application of the cells, the results of the neutron diffraction under pressure on pressure induced superconductors of UGe₂ and CeRhIn₅.