Disturbance-Free Observation of the Barkhausen Effect in Co/Pt Multilayer by X-ray Fourier Transform Holography

M. Suzuki; T. Nakamura; K. Nomura; S. Isogami; N. Awaji; M. Oura; E. Matsubara; T. Ishikawa; M. Tsunoda

doi:10.3379/msjmag.1206R005

Measurement Technique, High-frequency Devices

Disturbance-Free Observation of the Barkhausen Effect in Co/Pt Multilayer by X-ray Fourier Transform Holography

M. Suzuki, T. Nakamura, K. Nomura, S. Isogami, N. Awaji, M. Oura, E. Matsubara, T. Ishikawa, M. Tsunoda

Author information

M. Suzuki
JASRI/SPring-8
RIKEN SPring-8 Center
T. Nakamura
JASRI/SPring-8
RIKEN SPring-8 Center
K. Nomura
Device Integration Technologies Laboratory, Fujitsu Ltd.
RIKEN SPring-8 Center
S. Isogami
Department of Electronic Engineering, Tohoku University
N. Awaji
Device Integration Technologies Laboratory, Fujitsu Ltd.
RIKEN SPring-8 Center
M. Oura
RIKEN SPring-8 Center
E. Matsubara
RIKEN SPring-8 Center
Department of Materials Science and Engineering, Kyoto University
T. Ishikawa
RIKEN SPring-8 Center
M. Tsunoda
Department of Electronic Engineering, Tohoku University
RIKEN SPring-8 Center

Keywords: Magnetic domain, Magnetic imaging, Perpendicular magnetic film, Magnetization process

JOURNAL OPEN ACCESS

2012 Volume 36 Issue 4 Pages 304-307

DOI https://doi.org/10.3379/msjmag.1206R005

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Abstract

We demonstrate the evolution of local magnetic domain structures in a Co/Pt multilayer film by X-ray lensless Fourier transform holography. Fully using the advantages of the technique, we successfully visualized actual domain structures at a 50-nm spatial resolution without any disturbance by the probe. The field-induced domain evolution is described by the discontinuous creation of domain clusters, typically of sub-micrometer square area, appearing in different regions on the film. The results constitute direct microscopic visualization of the Barkhausen effect.

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