2026-10-13T23:08:16Z https://www.scidb.cn/oai

10.57760/sciencedb.05564 2022-11-27T21:55:58Z

2022-11-27 A mechanical rotatable magnetic force microscope operated in a 7 T superconducting magnet doi:10.57760/sciencedb.05564 en We present a mechanical rotatable magnetic force microscope (MFM) with precise angle control that can be operated in a 7 T superconducting magnet. An inertial piezoelectric motor called a SpiderDrive was used for the coarse approach because of its high compactness, high rigidity, and small size. Due to the mechanical rotation design, the MFM head can be rotated in a 7 T superconducting magnet with a bore size of 89 mm so that the direction of the magnetic field can be changed from 0° to 90° continuously. The highest in-plane magnetic field strength tested was 7 T. This is the first rotatable MFM ever reported. Using the homemade rotatable MFM, we investigated a 40 nm thick La0.67Ca0.33MnO3 (LCMO) thin film on NdGaO3 (100) substrate with anisotropy, determining that the charge-ordering insulating (COI) phase of the LCMO disappears as the direction of the magnetic field changed from 0° to 90°. Furthermore, the ferromagnetic pattern, appearing as bright and dark contrasts and similar to that formed by the S and N of a magnet, was seen parallel to the direction of the magnetic field. The rotatable MFM in this paper is expected to be widely used in studying the anisotropy of magnetic materials. Magnetic force microscope; Superconducting magnet; Anisotropy; High magnetic field; In-pane magnetic field Tengfei Guo Jihao Wang Wenjie Meng Jing Zhang Qiyuan Feng Ze Wang Feng Jin Wenbin Wu Qingyi Lu hou yu bin Qingyou Lu PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset http://www.doi.org/10.1016/j.ultramic.2020.113071 Science Data Bank