Kerr effect microscope combined with a pulse magnet to observe high-entropy alloys fabricated using combinatorial technology. Issue 1 (1st January 2021)

• Record Type: Journal Article
• Authors: Yagyu, Shinjiro; Mitsui, Tadashi; Chikyow, Toyohiro; Nagata, Takahiro
• Is Part Of: Science and Technology of Advanced Materials: Methods. Volume 1:Issue 1(2021)
• Page Start: 192
• Page End: 199
• Publication Date: 2021-01-01
• Subjects: Kerr effect microscope -- combinatorial technology -- pulse magnet; Materials data generation (High throughput instrumentation, experiments and/or calculation), Methodology, apparatus, experimental design -- High throughput data generation
• DOI: 10.1080/27660400.2021.1983883
• Languages: English
• ISSNs: 2766-0400

Abstract

ABSTRACT: We developed a module-type two-dimensional (2D) polar Kerr effect microscope using a pulse magnet with a pulse width of 13 ms and a maximum magnetic field of 7 kOe to accelerate the development of new soft magnetic materials. We also developed an algorithm and method to extract still images from a measurement movie file when the pulse magnetic field is applied. To evaluate the performance of this instrument, we measured high-entropy alloys based on FeCoMn samples, which were screened and selected using material informatics. Samples obtained through depositing Pt, Zn, Cu, and Ru on high-entropy FeCoMn alloys exhibited a brightness distribution proportional to the Kerr rotation angle in the applied magnetic field. The developed instrument enabled the high-speed magnetic field mapping of composition-spread thin films and is expected to accelerate new material development. Graphical abstract: uf0001