TEM sample preparation of lithographically patterned permalloy nanostructures on silicon nitride membranes

• Joshua Williams,
• Michael I. Faley,
• Joseph Vimal Vas,
• Peng-Han Lu and
• Rafal E. Dunin-Borkowski

Beilstein J. Nanotechnol. 2024, 15, 1–12, doi:10.3762/bjnano.15.1

• . Finally, we observed the vortex dynamics of the Py nanodisk under magnetic fields using LTEM and off-axis electron holography. A correlation between preparation methods and the properties of the Py nanostructures was made. Keywords: electron holography; Lorentz transmission electron microscopy; magnetic

• configuration occurs only under the right diameter/thickness ratio, otherwise either a single or multiple magnetic domains will appear. After Py nanodots of various sizes were fabricated, we used Lorentz transmission electron microscopy (LTEM) and off-axis electron holography to study their magnetic domain

• in a white contrast in the center. On the other side of the focus, the beam will be deflected outwards leaving an empty area and, therefore, a dark contrast in the center [23]. Off-axis electron holography is obtained from the interference (holograms) of the electron wave modulated by the magnetic

Magnetic characterization of cobalt nanowires and square nanorings fabricated by focused electron beam induced deposition

• Federico Venturi,
• Gian Carlo Gazzadi,
• Amir H. Tavabi,
• Alberto Rota,
• Rafal E. Dunin-Borkowski and
• Stefano Frabboni

Beilstein J. Nanotechnol. 2018, 9, 1040–1049, doi:10.3762/bjnano.9.97

• nanowires (NWs) and square nanorings, which were deposited by focused electron beam induced deposition (FEBID) of a Co carbonyl precursor, are studied using off-axis electron holography (EH), Lorentz transmission electron microscopy (L-TEM) and magnetic force microscopy (MFM). EH shows that NWs deposited

• ; magnetic force microscopy; magnetic nanostructures; off-axis electron holography; transmission electron microscopy; Introduction Magnetic nanostructures are studied intensively for their applications in high-density data storage [1][2], magnetic random access memory [3], magnetic logic nanodevices [4] and

• Fresnel mode [24]. We used a JEOL JEM-2010 TEM operated at 200 kV for L-TEM and an FEI Titan TEM operated at 300 kV for off-axis electron holography. L-TEM is an imaging technique that enhances local phase gradients, such as those associated with the presence of magnetic domain walls [25][26]. Fresnel

Magnetic properties of optimized cobalt nanospheres grown by focused electron beam induced deposition (FEBID) on cantilever tips

• Soraya Sangiao,
• César Magén,
• Darius Mofakhami,
• Grégoire de Loubens and
• José María De Teresa

Beilstein J. Nanotechnol. 2017, 8, 2106–2115, doi:10.3762/bjnano.8.210

• off-axis electron holography in a TEM [51]. Figure 5 illustrates the hologram acquisition and retrieval of the magnetic induction flux distribution in the nanosphere with 110 nm grown on the cantilever tips (see the analysis of the nanosphere with 90 nm diameter in Supporting Information File 1

• further correction for thickness effects was applied. Off-axis electron holography has been carried out in an FEI Titan Cube 60-300 equipped with a Schottky field emission gun (S-FEG), a CEOS corrector for the objective lens and a motorized electrostatic biprism. The experiments have been performed in

Magnetic interactions between nanoparticles

• Steen Mørup,
• Mikkel Fougt Hansen and
• Cathrine Frandsen

Beilstein J. Nanotechnol. 2010, 1, 182–190, doi:10.3762/bjnano.1.22

• aligned dipole moments. By the use of off-axis electron holography, it is possible to obtain information about the magnetization direction of individual nanoparticles in ensembles of interacting ferro- or ferrimagnetic nanoparticles. This technique measures quantitatively and non-invasively the in-plane