Vortex motion in amorphous ferrimagnetic thin film elements
| Autor: | Laura J. Heyderman, Eugenie Kirk, Harald Oezelt, Elisabeth Müller, Phillip Wohlhüter, Thomas Schrefl, Alexander Kovacs |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Magnetic domain Physics General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences lcsh:QC1-999 Vortex Amorphous solid Core (optical fiber) Condensed Matter::Materials Science Magnetization Magnetic anisotropy Condensed Matter::Superconductivity 0103 physical sciences ddc:530 0210 nano-technology Anisotropy Micromagnetics lcsh:Physics |
| Zdroj: | AIP Advances, 7 (5) AIP Advances, Vol 7, Iss 5, Pp 056001-056001-5 (2017) AIP Advances |
| ISSN: | 2158-3226 |
| Popis: | Amorphous Fe64Gd36 thin film square elements are investigated by imaging in theFresnel mode of a transmission electron microscope (TEM). The equilibrium statewithout an applied field shows the well-known four-domain flux closure patternwith in-plane magnetization. However, the vortex is displaced from the center ofthe square element and the domain walls are curved. In a reference measurement ofa thin Ni81Fe19 element, the vortex core is perfectly centered and the domain wallsstraight. When an increasing external field is applied in-plane, the vortex core canbe moved. While this motion of the vortex core is linear in NiFe elements, in theferrimagnetic FeGd squares the vortex core moves by sudden jumps. Micromagneticsimulations show that the asymmetry of the domain patterns as well as the vortexcore pinning and depinning can be attributed to random anisotropy and a patchymicrostructure in amorphous films. AIP Advances, 7 (5) ISSN:2158-3226 |
| Databáze: | OpenAIRE |
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