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A Mechanical Rotatable Magnetic Force Microscope Operated in a 7 T Superconducting Magnet
Ultramicroscopy ( IF 2.2 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.ultramic.2020.113071 Tengfei Guo 1 , Jihao Wang 2 , Wenjie Meng 2 , Jing Zhang 2 , Qiyuan Feng 2 , Ze Wang 3 , Feng Jin 3 , Wenbin Wu 3 , Qingyi Lu 4 , Yubin Hou 2 , Qingyou Lu 5
Ultramicroscopy ( IF 2.2 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.ultramic.2020.113071 Tengfei Guo 1 , Jihao Wang 2 , Wenjie Meng 2 , Jing Zhang 2 , Qiyuan Feng 2 , Ze Wang 3 , Feng Jin 3 , Wenbin Wu 3 , Qingyi Lu 4 , Yubin Hou 2 , Qingyou Lu 5
Affiliation
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.
中文翻译:
在 7 T 超导磁铁中操作的机械可旋转磁力显微镜
我们提出了一种具有精确角度控制的机械可旋转磁力显微镜 (MFM),可以在 7 T 超导磁体中操作。由于其高紧凑性、高刚性和小尺寸,称为 SpiderDrive 的惯性压电电机用于粗略方法。由于采用机械旋转设计,MFM磁头可以在孔径为89mm的7T超导磁体中旋转,使磁场方向可以从0°到90°连续变化。测试的最高平面磁场强度为 7 T。这是有史以来第一个可旋转的 MFM。使用自制的可旋转 MFM,我们在具有各向异性的 NdGaO3 (100) 衬底上研究了 40 nm 厚的 La0.67Ca0.33MnO3 (LCMO) 薄膜,确定当磁场方向从 0° 变为 90° 时,LCMO 的电荷有序绝缘 (COI) 相消失。此外,铁磁图案呈现为明暗对比,类似于磁铁的 S 和 N 形成的图案,与磁场方向平行。本文提出的可旋转磁力显微镜有望广泛应用于磁性材料的各向异性研究。
更新日期:2020-10-01
中文翻译:
在 7 T 超导磁铁中操作的机械可旋转磁力显微镜
我们提出了一种具有精确角度控制的机械可旋转磁力显微镜 (MFM),可以在 7 T 超导磁体中操作。由于其高紧凑性、高刚性和小尺寸,称为 SpiderDrive 的惯性压电电机用于粗略方法。由于采用机械旋转设计,MFM磁头可以在孔径为89mm的7T超导磁体中旋转,使磁场方向可以从0°到90°连续变化。测试的最高平面磁场强度为 7 T。这是有史以来第一个可旋转的 MFM。使用自制的可旋转 MFM,我们在具有各向异性的 NdGaO3 (100) 衬底上研究了 40 nm 厚的 La0.67Ca0.33MnO3 (LCMO) 薄膜,确定当磁场方向从 0° 变为 90° 时,LCMO 的电荷有序绝缘 (COI) 相消失。此外,铁磁图案呈现为明暗对比,类似于磁铁的 S 和 N 形成的图案,与磁场方向平行。本文提出的可旋转磁力显微镜有望广泛应用于磁性材料的各向异性研究。