Kyoto University

Akifumi Nakai

Kenjiro Kimura

Hirofumi Yamada

Kazumi Matsushige

Kei Kobayashi

Nobuo Satoh

Takashi Horiuchi

Above a sample () having magnetic domains, a distribution of magnetic force in a measurement plane () is obtained as a magnetic force image using a MFM, an auxiliary magnetic force image is obtained by performing measurement in a measurement plane () away from the measurement plane () by a distance d, and a difference between them is divided by the distance d to obtain a magnetic force gradient image. The magnetic force image and the auxiliary magnetic force image are Fourier transformed and substituted into a three-dimensional field obtaining equation derived from a general solution of the Laplace equation, and the three-dimensional field indicating the magnetic force is obtained. A state of the magnetic domains at the surface () of the sample () can be obtained with high accuracy by obtaining the three-dimensional field.

Growing community of inventors

Kyoto, Japan

Akifumi Nakai