A mechanical rotatable magnetic force microscope operated in a 7 T superconducting magnet

被引：6

作者：

Guo, Tengfei ^{[1
,2
,3
,4
]}

Wang, Jihao ^{[1
,2
]}

Meng, Wenjie ^{[1
,2
]}

Zhang, Jing ^{[1
,2
]}

Feng, Qiyuan ^{[1
,2
]}

Wang, Ze ^{[3
,4
]}

Jin, Feng ^{[3
,4
]}

Wu, Wenbin ^{[3
,4
]}

Lu, Qingyi ^{[5
,6
]}

Hou, Yubin ^{[1
,2
]}

Lu, Qingyou ^{[1
,2
,3
,4
,5
,7
]}

机构：

[1] Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China

[2] Chinese Acad Sci, High Magnet Field Lab Anhui Prov, Hefei 230031, Anhui, Peoples R China

[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[4] Univ Sci & Technol China, Anhui Lab Adv Photon Sci & Technol, Hefei 230026, Anhui, Peoples R China

[5] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[6] Nanjing Univ, Sch Chem Engn, State Key Lab Coordinat Chem, Nanjing Natl Lab Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[7] Chinese Acad Sci, Hefei Sci Ctr, Hefei 230031, Peoples R China

来源：

ULTRAMICROSCOPY | 2020年 / 217卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Magnetic force microscope; Superconducting magnet; Anisotropy; High magnetic field; In-pane magnetic field;

D O I：

10.1016/j.ultramic.2020.113071

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

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 degrees to 90 degrees 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 degrees to 90 degrees. 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.

引用

页数：7

共 28 条

[1] AN EASILY OPERABLE SCANNING TUNNELING MICROSCOPE [J].