Combining two-photon lithography with laser ablation of sacrificial layers: a route to isolated 3D magnetic nanostructures - data

<p>Data pertaining to the article titled “Combining two-photon lithography with laser ablation of sacrificial layers: a route to isolated 3D magnetic nanostructures”. Files include all data presented in the main text and the supplementary information and a readme file with further details regarding each file.</p><p>AFM data used to construct figure 2:</p><p>Raw atomic force micrographs of trenches ablated away from a poly(acrylic acid) layer using high-resolution femtosecond laser machining at varying laser power and scan speeds. File names take the format PXX_SYY where XX indicates laser power (mW) and YY indicates scan speed (μm per second)</p><p>“Fig2a_Fig2b.txt” cropped and rotated version of P100_S1000 presented as an ASCII matrix for illustrative purposes in fig 2a and fig 2b. X, Y, and Z scales indicated in file header.</p><p>“Fig2c_TrenchProfile.txt” profile drawn from the trench shown in P100_S1000. Two column file with position along line scan (μm) and height (nm)</p><p>“Fig2d_FWHM.txt” mean FWHM measurements (μm) of ablated trenches as a function of laser power and scan speed. Uncertainty is the standard deviation. 9 column file, the first column indicates laser power (mW), and the headers indicate scan speed.</p><p>“Fig2e_Depth.txt” mean depth measurements of ablated trenches as a function of laser power and scan speed. Uncertainty is the standard deviation. 9 column file, the first column indicates laser power (mW), and the headers indicate scan speed.</p><p>Data used to construct figure 3:</p><p>“Simple Pad Wire.tif” Scanning electron micrograph of a 300 nm wide and  80 μm long magnetic nanowire with a 20μm×20μm injection pad fabricated using two-photon lithography and line of sight deposition. Image captured at 1k magnification and 5kV beam.</p><p>“Fig3b_Contour.txt” ASCII matrix file containing emission spectra measured using energy dispersive x-ray analysis at regular points along a line intersecting a magnetic nanowire like the wire shown in the scanning electron micrograph.</p><p>“Fig3b_NiFe_intensity.txt” three-column file indicating L(α1) intensity of Nickel and Iron along the EDX line scan.</p><p>“Fig3b_OnWire_Spectrum.txt” two-column file with emission spectrum data measured on the wire.</p><p>“Fig3c_SimpleWire.txt” Magnetic hysteresis loop of a simple magnetic nanowire without nucleation pad (Length: 80 μm, width: 300 nm. Thickness 27 nm) measured using magneto optical kerr effect magnetometry with field applied along wire long axis. Three-column file indicating magnetic field (mT), detector voltage (V), and normalised detector voltage.</p><p>“Fig3d_PaddedWire_Pad.txt” Magnetic hysteresis loop of a magnetic nanowire (Length: 80 μm, width: 300 nm. Thickness 27 nm) with a 20μm×20μm injection pad. The laser spot is focused on the injection pad. Three-column file indicating magnetic field (mT), detector voltage (V), and normalised detector voltage.</p><p>“Fig3d_PaddedWire_Wire.txt” Magnetic hysteresis loop of a magnetic nanowire (Length: 80 μm, width: 300 nm. Thickness 27 nm) with a 20μm×20μm injection pad. The laser spot is focused on the middle of the wire. Three-column file indicating magnetic field (mT), detector voltage (V), and normalised detector voltage.</p><p>Data used to construct figure 4:</p><p>“Fig4c_s-polarised.txt” Magnetic hysteresis loop of magnetic nanowire lattice comprising  1 μm Pemalloy wires arranged in a diamond-bond lattice configuration. The hysteresis loop is measured using MOKE magnetometry with s-polarised light and an analyser angle of 3 degrees. Three-column file indicating magnetic field (mT), detector voltage (V), and normalised detector voltage.</p><p>“Fig4d_p-polarised.txt” Magnetic hysteresis loop of magnetic nanowire lattice comprising  1 μm Pemalloy wires arranged in a diamond-bond lattice configuration. The hysteresis loop is measured using MOKE magnetometry with p-polarised light and an analyser angle of 90 degrees. Three-column file indicating magnetic field (mT), detector voltage (V), and normalised detector voltage.</p><p>Data used to construct figure 5:</p><p>“Fig5a_L-bipod_00deg.txt” – micromagnetic simulation of a hysteresis loop performed on the lower bipod geometry (L_bipod_00.nmesh.h5) with fields applied along the xy-projection (x-axis) of the long axes. Four-column file indicating applied field (mT), and magnetisation along the principal axes (Long = x, trans = y, pol = z)</p><p>“Fig5a_L-bipod_90deg.txt” – micromagnetic simulation of a hysteresis loop performed on the lower bipod geometry (L_bipod_90.nmesh.h5) with fields applied along x axis. The geometry has been rotated 90 degrees about the z axis. Four-column file indicating applied field (mT), and magnetisation along the principal axes (Long = x, trans = y, pol = z)</p><p>“Fig5a_U-bipod_00deg.txt” – micromagnetic simulation of a hysteresis loop performed on the upper bipod geometry (U_bipod_00.nmesh.h5) with fields applied along the xy-projection (x-axis) of the long axes. Four-column file indicating applied field (mT), and magnetisation along the principal axes (Long = x, trans = y, pol = z)</p><p>“Fig5a_U-bipod_90deg.txt” – micromagnetic simulation of a hysteresis loop performed on the upper bipod geometry (U_bipod_90.nmesh.h5) with fields applied along x axis. The geometry has been rotated 90 degrees about the z axis. Four-column file indicating applied field (mT), and magnetisation along the principal axes (Long = x, trans = y, pol = z)</p><p>This folder also contains the relevant scripts for nMag and the mesh files for each geometry.</p><p>Supplementary info data:</p><p>S1</p><p>The AFM images shown in S1 are found in the fig 2/Raw AFM Data folder</p><p>S2</p><p>“FigS2a_Left.txt” MOKE measurement of the substrate left of the nucleation pad on the wires measured in fig 5d and fig 5e. Two-column file indicating magnetic field (mT), detector voltage (V)</p><p>“FigS2b_Above.txt” MOKE measurement of the substrate above the wires measured in fig 5d and fig 5e. Two-column file indicating magnetic field (mT), detector voltage (V)</p><p>“FigS2c_Right.txt” MOKE measurement of the substrate beyond the end of the wires measured in fig 5d and fig 5e. Two-column file indicating magnetic field (mT), detector voltage (V)</p><p>S3</p><p>“FigS3_p-polarised.txt” Magnetic hysteresis loop of magnetic nanowire lattice comprising  1 μm Pemalloy wires arranged in a diamond-bond lattice configuration. The hysteresis loop is measured using MOKE magnetometry with p-polarised light and an analyser angle of 3 degrees. The two-column file indicates the magnetic field (mT) and detector voltage (V).</p><p>S4</p><p>“L_bipod_Hyst_90-65.157mT.vtk” & “L_bipod_Hyst_90-66.159mT” VTK files from the “L_bipod_Hyst_90.py” simulation (Fig 5b) showing field steps at 66.159 mT and 65.157 mT. VTKs may be rendered using Paraview software.</p><p>S5</p><p>Selected VTKs of the “U_bipod_Hyst_00.py” simulation with filenames corresponding to the figure panels.</p><p>- “FigS5a.vtk” at remanence</p><p>- “FigS5b.vtk” at -34mT</p><p>- “FigS5c.vtk” at -35 mT</p><p>S6</p><p>Each component in fig 5 is normalised for clarity. Fig S6 presents the polar component of the simulation “Fig5b_L-bipod_90deg.txt” (panel a) and “Fig5d_U-bipod_90deg.txt” (panel b) to indicate the scale of the polar signal in these simulations. The data for these figures is in the “Fig 5” folder.</p><p>Fig S7</p><p>Lower bipod simulations repeat the “L_bipod_Hyst_00.py” simulation after introducing a 5 and 85-degree rotation in the simulation geometry. Four-column file with applied fields (mT) along x in columns 1 and 3. X-component of magnetisation for each rotation in columns 2 and 4. Rotation is indicated in the header. Note that columns 1 and 2 are two entries shorter than columns 3 and 4, the empty entry is indicated with “--”</p><p>Research results based upon these data are published at https://doi.org/10.1007/s12274-022-4649-z<br></p>