Pulsed magnetic field magnetic force microscope and evaluation of magnetic properties of soft magnetic tips. (22nd July 2015)

• Record Type: Journal Article
• Authors: Zheng, Yangdong; Yoshimura, Satoru; Egawa, Genta; Zheng, Fu; Kinoshita, Yukinori; Saito, Hitoshi
• Is Part Of: Journal of physics. Volume 48:Number 33(2015)
• Publication Date: 2015-07-22
• Subjects: magnetic force microscope -- pulsed magnetic field -- soft magnetic tip -- magnetization curve; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/48/33/335006
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: A pulsed magnetic field magnetic force microscope (PMF-MFM) is developed for evaluation of the magnetic properties of nano-scale materials and devices, as well as the characteristics of MFM tips. We present the setup of the PMF-MFM system, and focus on the evaluation of a FeCo soft magnetic tip by PMF-MFM. We find a new theoretical method to calculate tip magnetization curves ( M - H curves) using MFM phase signals. We measure the MFM phase and amplitude signals for the FeCo tip during the presence of the pulsed magnetic fields oriented parallel and antiparallel to the initial tip magnetization direction, and acquire the tip coercivity H c ~ 1.1 kOe. The tip M - H curves are also calculated using the MFM phase signals data. We obtain the basic features of the tip magnetic properties from the tip M - H curves.