Gysin U, Rast S, Kisiel M, Werle C, Meyer E
Department of Physics, University of Basel, Basel, Switzerland.
Rev Sci Instrum. 2011 Feb;82(2):023705. doi: 10.1063/1.3551603.
A noncontact atomic force microscope (nc-AFM) operating in magnetic fields up to ±7 T and liquid helium temperatures is presented in this article. In many common AFM experiments the cantilever is mounted parallel to the sample surface, while in our system the cantilever is assembled perpendicular to it; the so called pendulum mode of AFM operation. In this mode measurements employing very soft and, therefore, ultrasensitive cantilevers can be performed. The ultrahigh vacuum conditions allow to prepare and transfer cantilevers and samples in a requested manner avoiding surface contamination. We demonstrate the possibility of nc-AFM and Kelvin force probe microscopy imaging in the pendulum mode. Ultrasensitive experiments on small spin ensembles are presented as well.
本文介绍了一种在高达±7 T的磁场和液氦温度下运行的非接触式原子力显微镜（nc-AFM）。在许多常见的AFM实验中，悬臂平行于样品表面安装，而在我们的系统中，悬臂垂直于样品表面组装；这就是所谓的AFM操作的摆式模式。在这种模式下，可以使用非常柔软、因此超灵敏的悬臂进行测量。超高真空条件允许以所需方式制备和转移悬臂及样品，避免表面污染。我们展示了在摆式模式下进行nc-AFM和开尔文力探针显微镜成像的可能性。还介绍了对小自旋系综的超灵敏实验。
