注意：用于商用超导量子干涉仪磁力计的微型陶瓷砧座细胞在高压下磁测量的灵敏度提高。

Note: Improved sensitivity of magnetic measurements under high pressure in miniature ceramic anvil cell for a commercial SQUID magnetometer.

作者信息

Tateiwa Naoyuki, Haga Yoshinori, Matsuda Tatsuma D, Fisk Zachary, Ikeda Shugo, Kobayashi Hisao

机构信息

Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Naka, Ibaraki, Japan.

出版信息

Rev Sci Instrum. 2013 Apr;84(4):046105. doi: 10.1063/1.4802832.

DOI:10.1063/1.4802832

PMID:23635239

Abstract

Two modifications have been made to a miniature ceramic anvil high pressure cell (mCAC) designed for magnetic measurements at pressures up to 12.6 GPa in a commercial superconducting quantum interference (SQUID) magnetometer [N. Tateiwa et al., Rev. Sci. Instrum. 82, 053906 (2011); ibid. 83, 053906 (2012)]. Replacing the Cu-Be piston in the former mCAC with a composite piston composed of the Cu-Be and ceramic cylinders reduces the background magnetization significantly smaller at low temperatures, enabling more precise magnetic measurements at low temperatures. A second modification to the mCAC is the utilization of a ceramic anvil with a hollow in the center of the culet surface. High pressures up to 5 GPa were generated with the "cupped ceramic anvil" with the culet size of 1.0 mm.

摘要

对一个微型陶瓷砧高压腔（mCAC）进行了两项改进，该高压腔设计用于在商用超导量子干涉（SQUID）磁力计中进行高达12.6 GPa压力下的磁性测量 [N. Tateiwa等人，《科学仪器评论》82, 053906 (2011); 同上，83, 053906 (2012)]。用由铜铍和陶瓷圆柱体组成的复合活塞取代原mCAC中的铜铍活塞，可显著降低低温下的背景磁化强度，从而能够在低温下进行更精确的磁性测量。对mCAC的第二项改进是使用在压砧表面中心有空心的陶瓷砧。使用压砧尺寸为1.0 mm的“杯状陶瓷砧”产生了高达5 GPa的高压。