论文标题
使用基于压电的设备进行温度调节的扩散计
A temperature-modulated dilatometer by using a piezobender-based device
论文作者
论文摘要
我们报告了一种新的温度调节扩散计设计，该设计分别通过压电者和热电偶测量样品的长度和温度的振荡变化来获得线性热膨胀系数。以铁为例，使用基于铁的超导体KFE $ _2 $作为$ _2 $，我们表明该设备能够在低温和高磁场下测量具有高分辨率的薄样品。尽管具有绝对值的能力无能，但新的扩散计提供了一种高分辨率方法，可以研究凝结物理学中许多重要的物理特性，例如热和量子相变，以及超导状态下的涡流动力学。该设备的原型设计可以在许多方面进一步改进，以满足特定要求。
We report a new design of temperature-modulated dilatometer, which obtains the linear thermal expansion coefficient by measuring the oscillating changes of the sample's length and temperature by a piezobender and a thermocouple, respectively. Using an iron-based superconductor KFe$_2$As$_2$ as an example, we show that this device is able to measure thin samples with high resolutions at low temperatures and high magnetic fields. Despite its incapability of giving absolute values, the new dilatometer provides a high-resolution method to study many important physical properties in condensed matter physics, such as thermal and quantum phase transitions, and vortex dynamics in the superconducting state. The prototype design of this device can be further improved in many aspects to meet particular requirements.
