Domain Wall Motions in Ferromagnetic Thin Film Induced by Laser Heating Pulse
Hyun Soon Park
Department of Materials Science and Engineering, Inha University, Incheon 22212, Korea
Correspondence to: Park HS, https://orcid.org/0000-0002-1039-7334, Tel: +82-32-860-7533, Fax: +82-32-862-5546, E-mail: hsparkinha@inha.ac.kr
Received December 21, 2018; Revised December 26, 2018; Accepted December 26, 2018.
This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
- Abstract
Soft ferromagnetic materials are utilized for various electromagnetic devices such as magnetic recording heads and magnetic shielding. In situ observation of magnetic microstructures and domain wall motions are prerequisite for understanding and improving their magnetic properties. In this work, by the Fresnel (out-of-focus) method of Lorentz microscopy, we observe the domain wall motions of polycrystalline Ni/Ti thin film layers triggered by single-shot laser pulse. Random motions of domain walls were visualized at every single pulse.
- Keywords : Lorentz microscopy, Ferromagnetic thin film, Domain wall, Laser heating pulse, TEM
- References
- Chikazumi, S (1997). Physics of ferromagnetism. Oxford: Oxford Science Publications
- Zewail, AH, and Thomas, JM (2010). 4D electron microscopy: imaging in space and time. London: Imperial College Press
- Graef, MD, and Zhu, Y (2001). Magnetic imaging and its applications to materials. London: Academic Press
- Park, HS, Baskin, JP, and Zewail, AH (2010). 4D Lorentz electron microscopy imaging: magnetic domain wall nucleation, reversal, and wave velocity. Nano Letters. 10, 3796-3803.
- Lee, SJ, Lee, HJ, Song, K, Choi, SY, and Park, HS (2017). In-situ observation of domain wall motion in electroplated Ni80-Fe20 thin film by Lorentz TEM and DPC imaging. Journal of Magnetics. 22, 563-560.
- December 2018, 48 (4)
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Funding Information-
Inha University
10.13039/501100002635
