A5060543574- Magnetic properties of thin films
- Magnetic Properties of Alloys
- Magnetic Properties and Applications
- Characterization and Applications of Magnetic Nanoparticles
- Magnetic Field Sensors Techniques
- Surface and Thin Film Phenomena
- Geomagnetism and Paleomagnetism Studies
- Physics of Superconductivity and Magnetism
- Non-Destructive Testing Techniques
- Magnetic and transport properties of perovskites and related materials
- Metallic Glasses and Amorphous Alloys
- Quantum and electron transport phenomena
- Superconducting Materials and Applications
- Topological Materials and Phenomena
- Geophysical and Geoelectrical Methods
Universidad de Oviedo
2021-2025
Bilayers of NdCo5/Ni8Fe2 can act as reconfigurable racetracks thanks to the parallel stripe-domain configuration present in hard magnetic material with weak perpendicular anisotropy (NdCo5), and its imprint on soft layer (Ni8Fe2). This pattern hosts domain walls well-defined vortex-antivortex configurations establishes paths for their deterministic propagation under effect pulsed currents. Magnetic transmission x-ray microscopy experiments show guided domain-wall events within Ni8Fe2 above a...
Abstract Full control of magnetic properties in exchange coupled systems requires a good understanding 3D configuration with lateral and in-depth resolution. Here we show results from soft X-ray tomographic reconstruction which allow determining, solely the experimental data, detailed description vector ferrimagnetic Gd 12 Co 88 /Nd 17 83 /Gd 24 76 trilayer engineered competing anisotropy, magnetostatic interactions at different depths. The displays chevron patterns distorted closure...
Abstract Bloch points are small 3D magnetic textures with unit topological charge that require the use of advanced vector imaging techniques for their direct experimental characterization. Here we show results from reconstruction magnetization field $${{{{{\bf{m}}}}}}\left({{{{{\bf{r}}}}}}\right)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>m</mml:mi> <mml:mfenced> <mml:mrow> <mml:mi>r</mml:mi> </mml:mrow> </mml:mfenced> </mml:math> an elongated permalloy...
Bloch points in magnetic materials are attractive entities view of information transport. Here, point configuration has been investigated and experimentally determined a trilayer (Gd12Co88/Nd17Co83/Gd24Co76) with carefully adjusted composition within the ferrimagnetic GdxCo1-x alloys order to engineer saturation magnetization, exchange length, interlayer couplings (ferromagnetic vs antiferromagnetic). X-ray vector tomography allowed us determine polarity (related topological charge) helicity...
Bilayers of NdCo$_5$/Ni$_8$Fe$_2$ can act as reconfigurable racetracks thanks to the parallel stripe domain configuration present in hard magnetic material with weak perpendicular anisotropy (NdCo$_5$), and its imprint on soft layer (Ni$_8$Fe$_2$). This pattern hosts spin textures well defined topological charges establishes paths for their deterministic propagation under effect pulsed currents, which has been studied a function externally applied fields by using Magnetic Transmission X-ray...
Patterned elements of permalloy (Py) with a thickness as large 300 nm have been defined by electron beam lithography on X-ray-transparent 50 thick membranes in order to characterize their magnetic structure via Magnetic Transmission X-ray Microscopy (MTXM). To avoid the situation where fragility causes them break during process, it has found that spin coating resist must be applied two steps. The MTXM results show our samples central domain wall, well other types walls, if nanostructures are...
Bloch points in magnetic materials are attractive entities view of information transport. Here, point configuration has been investigated and experimentally determined a trilayer ($Gd_{12}Co_{88}/Nd_{17}Co_{83}/Gd_{24}Co_{76}$) with carefully adjusted composition within the ferrimagnetic $Gd_{x}Co_{1-x}$ alloys order to engineer saturation magnetization, exchange length, interlayer couplings (ferromagnetic vs antiferromagnetic). X-ray vector tomography allowed us determine polarity (related...
Advanced vector imaging techniques provide us with 3D maps of magnetization fields in which topological concepts can be directly applied to describe real-space experimental textures non-ideal geometries. Here, the a low symmetry permalloy microstructure is obtained by X-ray magnetic tomography and analysed detail terms charges emergent fields. A central asymmetric domain wall complex structure observed chirality transitions are mediated Bloch points arranged several dipoles triplet. The...
Soft X-ray magnetic vector tomography has been used to visualize with unprecedented detail and solely from experimental data the 3D configuration of a ferrimagnetic Gd12Co88/Nd17Co83/Gd24Co76 multilayer competing anisotropy, exchange magnetostatic interactions at different depths. The trilayer displays stripe domains, arranged in chevron pattern, which are imprinted central Nd17Co83 into bottom Gd12Co88 layer distorted closure domain structure across thickness. Near top Gd24Co76 layer, local...