基于AFM压电悬臂梁的高分辨率微型应变计
High resolution miniature dilatometer based on AFM piezocantilever
摘要：
热膨胀或膨胀与比热密切相关，并提供有关材料特性的有用信息。在受限空间中精确测量膨胀，再加上其他限制性的实验环境，如低温和快速变化的高磁场，需要一种新的敏感毫米尺寸的膨胀计，几乎没有或没有温度和磁场的依赖性。我们已经设计了一个超紧凑的微位移计使用原子力显微镜（AFM）的压阻悬臂梁作为传感元件，并证明了其多功能性，通过研究的电荷密度波（CDWS）在α铀高磁场（高达31 T）。该压阻式压力计的性能与钛电容式压力计的性能相当。
英文摘要：
Thermal expansion, or dilation, is closely related to the specific heat, and provides useful information regarding material properties. The accurate measurement of dilation in confined spaces coupled with other limiting experimental environments such as low temperatures and rapidly changing high magnetic fields requires a new sensitive millimeter size dilatometer that has little or no temperature and field dependence. We have designed an ultra compact dilatometer using an atomic force microscope (AFM) piezoresistive cantilever as the sensing element and demonstrated its versatility by studying the charge density waves (CDWs) in alpha uranium to high magnetic fields (up to 31 T). The performance of this piezoresistive dilatometer was comparable to that of a titanium capacitive dilatometer.
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