Two modifications have been made to a miniature ceramic anvil high pressure cell (mCAC) designed for magnetic measurements at pressures up to 12.6 GPa in a commercial superconducting quantum interference (SQUID) magnetometer [N. Tateiwa et al, Rev. Sci. Instrum. 82, 053906 (2011)

https://doi.org/10.1063/1.3590745
; N. Tateiwa et al, Rev. Sci. Instrum. 83, 053906 (2012)
https://doi.org/10.1063/1.4722945
]. Replacing the Cu-Be piston in the former mCAC with a composite piston composed of the Cu-Be and ceramic cylinders reduces the background magnetization significantly smaller at low temperatures, enabling more precise magnetic measurements at low temperatures. A second modification to the mCAC is the utilization of a ceramic anvil with a hollow in the center of the culet surface. High pressures up to 5 GPa were generated with the “cupped ceramic anvil” with the culet size of 1.0 mm.

Topics
Superconducting quantum interference device, Magnetic susceptibility, Measuring instruments, Magnetic fields, Cryogenics, Mechanical instruments, Ceramics, Hydrostatics
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