Domain Wall Motions in Ferromagnetic Thin Film Induced by Laser Heating Pulse
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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.
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.
참고문헌 (5)
- Chikazumi S, "Physics of ferromagnetism" (1997), Oxford Science Publications
- Zewail A H, "4D electron microscopy: imaging in space and time" (2010), Imperial College Press
- Graef M D, "Magnetic imaging and its applications to materials" (2001), Academic Press
- Park H S, "4D Lorentz electron microscopy imaging: magnetic domain wall nucleation, reversal, and wave velocity", Nano Letters, 10, pp.3796~3803 (2010)
- 이수진, "In-situ Observation of Domain Wall Motion in Electroplated Ni80-Fe20 Thin Film by Lorentz TEM and DPC Imaging", Journal of Magnetics, 22(4), pp.563~569 (2017), 한국자기학회