世界最小高精度电容膨胀仪及其施加应力对应装置的新应用
New applications for the world's smallest high-precision capacitance dilatometer and its stress-implementing counterpart
AI总结：
本文研制与最小微型电容膨胀仪同尺寸同重量、可更换本体的新型应力膨胀仪，并将两类膨胀仪用于PPMS DynaCool原位旋转和稀释制冷机低温测量。
摘要：
我们介绍了一种新型应力膨胀仪，其尺寸和重量与世界上最小的微型电容膨胀仪完全相同（高×宽×深＝15 mm×14 mm×15 mm，重量：12 g）。为开发这一新装置，只需更换最新研制的微型膨胀仪中的单个部件，即所谓的“本体”。因此，这种具有可更换本体的新型微型膨胀仪可在有和无大应力条件下，对热膨胀和磁致伸缩进行高分辨率测量。我们还报告了两种微型膨胀仪池的两项新颖应用。我们的新装置首次安装在无液氦系统（PPMS DynaCool）中。第一项新设置允许两种膨胀仪在320 K至1.8 K的温度范围内，于-90 deg > μ > +90 deg之间的任意角度进行原位旋转。我们还将微型池安装在PPMS DynaCool的稀释制冷机插件中，从而现在能够在4 K至0.06 K的温度范围内进行膨胀测量。由于样品空间有限，此前无法开展此类测量。对于这两项新应用，我们都能分辨高达0.01 Å的显著长度变化。
英文摘要：
We introduce a new stress dilatometer with exactly the same size and weight as the world's smallest miniature capacitance dilatometer (height x width x depth = 15 mmx14 mmx15 mm, weight: 12 g). To develop this new device, only a single part of the most recently developed mini-dilatometer, the so-called 'body', needs to be replaced. Therefore, the new mini dilatometer with an interchangeable body can be used for high-resolution measurements of thermal expansion and magnetostriction with and without large stress. We also report two novel applications of both mini-dilatometer cell types. Our new setup was installed for the first time in a cryogen-free system (PPMS DynaCool). The first new setup allows the rotation of both dilatometers in situ at any angle between -90 deg > μ > +90 deg in the temperature range from 320 K to 1.8 K. We also installed our mini-cells in a dilution refrigerator insert of a PPMS DynaCool, in which dilatometric measurements are now possible in the temperature range from 4 K to 0.06 K. Because of the limited sample space, such measurements could not be performed so far. For both new applications, we can resolve the impressive length changes to 0.01 A.
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