Piezoelectric-based uniaxial pressure cell with integrated force and\n displacement sensors

2018/10/22 by Mark E. Barber, Alexander Steppke, Barber, Mark E. +5 · 1 citation
Engineering · #Advanced MEMS and NEMS Technologies #Acoustic Wave Resonator Technologies #Geophysics and Sensor Technology

paper · pdf · doi:10.48550/arxiv.1810.09573

Abstract

We present a design for a piezoelectric-driven uniaxial stress cell suitable\nfor use at ambient and cryogenic temperatures, and that incorporates both a\ndisplacement and a force sensor. The cell has a diameter of 46 mm and a height\nof 13 mm. It can apply a zero-load displacement of up to ~45 \μm, and a\nzero-displacement force of up to ~245 N. With combined knowledge of the\ndisplacement and force applied to the sample, it can quickly be determined\nwhether the sample and its mounts remain within their elastic limits. In tests\non the oxide metal Sr₂RuO₄, we found that at room temperature serious\nplastic deformation of the sample onset at a uniaxial stress of ~0.2 GPa, while\nat 5 K the sample deformation remained elastic up to almost 2 GPa. This result\nhighlights the usefulness of in situ tuning, in which the force can be applied\nafter cooling samples to cryogenic temperatures.\n

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