Magnetic field spatial fourier analysis : a new opportunity for high resolution current localization

• Main Authors: Gan, C. L., Lewis, D., Infante, F., Perdu, P., Kor, H. B.
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2011
• Subjects: DRNTU::Engineering::Materials::Microelectronics and semiconductor materials
• Online Access: https://hdl.handle.net/10356/85280; http://hdl.handle.net/10220/7243
• Institution: Nanyang Technological University

Magnetic microscopy has proven its usefulness throughout the years. It allows current localization with a certain degree of precision by using an inversion algorithm to invert the Biot–Savart law. The goal is to obtain the current distribution once the magnetic field is given. However, in order to obtain a stable solution, the magnetic data is severely low-pass filtered in the spatial Fourier domain, and some important information is lost. In this paper, the contribution given by the different spatial frequencies was studied: it was demonstrated how this information can be used to obtain additional information regarding the position of the currents. A comparative study between the theoretical approach and the application to the measurements is also shown.