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KMID : 1102020180480040128
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Applied Microscopy
2018 Volume.48 No. 4 p.128 ~ p.129
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Domain Wall Motions in Ferromagnetic Thin Film Induced by Laser Heating Pulse
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Park Hyun-Soon
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Abstract
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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.
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KEYWORD
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Lorentz microscopy, Ferromagnetic thin film, Domain wall, Laser heating pulse, TEM
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