Barber Mark E, Steppke Alexander, Mackenzie Andrew P, Hicks Clifford W
Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, Dresden 01187, Germany.
Rev Sci Instrum. 2019 Feb;90(2):023904. doi: 10.1063/1.5075485.
We present a design for a piezoelectric-driven uniaxial stress cell suitable for use at ambient and cryogenic temperatures and that incorporates both a displacement and a force sensor. The cell has a diameter of 46 mm and a height of 13 mm. It can apply a zero-load displacement of up to ∼45 μm and a zero-displacement force of up to ∼245 N. With combined knowledge of the displacement and force applied to the sample, it can quickly be determined whether the sample and its mounts remain within their elastic limits. In tests on the oxide metal SrRuO, we found that at room temperature serious plastic deformation of the sample onset at a uniaxial stress of ∼0.2 GPa, while at 5 K the sample deformation remained elastic up to almost 2 GPa. This result highlights the usefulness of in situ tuning, in which the force can be applied after cooling samples to cryogenic temperatures.
我们展示了一种适用于环境温度和低温的压电驱动单轴应力传感器的设计，该传感器集成了位移传感器和力传感器。该传感器直径为46毫米，高度为13毫米。它可施加高达约45微米的零负载位移和高达约245牛的零位移力。结合施加到样品上的位移和力的相关知识，可以快速确定样品及其支架是否仍在其弹性极限范围内。在对氧化物金属SrRuO进行的测试中，我们发现，在室温下，样品在约0.2吉帕的单轴应力下开始出现严重塑性变形，而在5开尔文时，样品在接近2吉帕的应力下仍保持弹性变形。这一结果凸显了原位调节的有用性，即在将样品冷却至低温后再施加力。
