In this paper, a scanning tunneling microscope (STM) is presented that operates in a 27.5 T magnetic field within a hybrid magnet. The coarse approach of the STM is realized by using an inertial piezoelectric motor, and the scanning is realized by using a miniature scanner, which stands alone on a sapphire base. A combined vibration isolation system consisting of a brick-rubber-brick stack and two springs is used to isolate the vibration generated from the magnet. An enclosed copper shield is used to prevent sound from entering the tip-sample junction. The sound and vibration isolation measures highly improve the stability of the STM imaging. All the materials selected to construct the STM head are nonmagnetic. The drift rates of the STM in the X-Y plane and Z direction are as low as 26.2 pm/min and 34.6 pm/min, respectively, under ambient conditions. The high performance of the homebuilt STM was demonstrated by graphite hexagonal lattice images obtained in magnet fields ranging from 0 T to 27.5 T even without the protection of a vacuum and low temperatures. As far as known, this is the first STM that operates in a hybrid magnet. It is also the first STM that can obtain graphite hexagonal lattice images in magnetic fields up to 27.5 T. Our results greatly contribute to the further STM studies under ambient conditions and ultrahigh magnetic fields.

中文翻译：

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基于混合磁体的扫描隧道显微镜

在本文中，介绍了一种扫描隧道显微镜 (STM)，该显微镜在混合磁体内的 27.5 T 磁场中运行。STM的粗进路是利用惯性压电马达实现的，扫描是利用独立在蓝宝石底座上的微型扫描仪实现的。由砖-橡胶-砖堆和两个弹簧组成的组合隔振系统用于隔离磁铁产生的振动。封闭的铜屏蔽用于防止声音进入尖端-样品连接处。声音和振动隔离措施大大提高了STM成像的稳定性。为构建 STM 头而选择的所有材料都是非磁性的。STM在XY平面和Z方向的漂移率分别低至26.2 pm/min和34.6 pm/min，在环境条件下。即使在没有真空和低温保护的情况下，在 0 T 到 27.5 T 的磁场中获得的石墨六角晶格图像也证明了自制 STM 的高性能。据了解，这是第一个在混合磁铁中运行的 STM。它也是第一个可以在高达 27.5 T 的磁场中获得石墨六方晶格图像的 STM。我们的结果极大地有助于环境条件和超高磁场下的进一步 STM 研究。