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Showing 1 to 20 of 24 for “"Magnetocrystalline anisotropy"”.
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Filmes de FePt para dispositivos da spintrônica
… The compound has tetragonal structure and strong magnetocrystalline anisotropy. Films were prepared by sputtering. For measuring Tunnel Anisotropic Magnetoresistance (TAMR), FePt/AlOx/Au trilayers were prepared. All prepared alloys exhibited significant coercivity. In some of them, coercive fields …
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Quantitative High-angle Annular Dark Field Scanning Transmission To Electron Microscopy For Materials Science
… media, as this phase is known to have large magnetocrystalline anisotropy, with magnetocrystalline anisotropy constant, Ku, strongly dependent on the long-range chemical order parameter, S. A new method is developed to assess the degree of chemical order in small FePt L10 nanoparticles by …
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High Anisotropy CoPt (L1(0) & L1(1) Phase) Magnetic Recording Media Films
… recording media. Media material with large magnetocrystalline anisotropy (Ku) is required to delay the onset of superparamagnetism. L1(0) and L1(1) phase CoPt thin films have been considered as potential candidates due to their large Ku values and corrosion resistance, which allow smaller …
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Magnetic and thermal properties of metallic antiferromagnetic materials
… of magnetic domains, and the efficiency. Thus magnetocrystalline anisotropy is a fundamental property of antiferromagnetic materials. Torque magnetometry measurements of Fe2As were performed. We reported that the four-fold magnetocrystalline anisotropy K22 in the (001)-plane of Fe2As is K22 = …
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Anisotropic behaviour of magneto-electric coupling in multiferroic composites
The anisotropy of the direct magnetoelectric effect in textured nickel ferrite/lead zirconate titanate strain mediated bilayer composites has been studied. The magnetic layers of these samples have been crystallographically textured in planes of the form {100}, {110} and {111}. In this study, it is …
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Pulse-field actuation of collinear magnetic single crystals
… (non-equilibrium, low-temperature) phase. The magnetocrystalline anisotropy must also be large, as seen in similar alloys such as iron-palladium (Fe₇₀Pd₃₀) [1]. Nickel-manganese-gallium is an FSMA that has shown up to 10% strain in certain orientations as an effect of unconstrained magnetic …
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Computer simulation studies of magnetic nanostructures
… more important than other factors such as magnetocrystalline anisotropy . the smaller the object, the more strongly the shape anisotropy affects the hysteresis loop.<br/><br/>We investigate the micromagnetic behaviour of ferromagnetic samples of various geometries using numerical methods. …
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Micromagnetic analysis of co-based magnetic nanostructures.
… perpendicular switching fields less than the anisotropy field and a different angular dependence than theoretically expected. Micromagnetic simulations were performed, which included multiple elements per grain and magnetostatic interactions between elements. Two likely explanations have …
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High Anisotropy Magnetic Materials for Data Storage and Spintronic Memory
… development of magnetic thin films with large magnetocrystalline anisotropy. Switching the magnetization of high anisotropy magnetic materials requires large Oersted field or spin current. One way to decrease the switching energy is to lower the anisotropy during the switching process with an …
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Observation and characterisation of magnetisation ripple using Lorentz transmission electron microscopy
… and texture reduction, an increase in uniaxial anisotropy and a reduction in magnetisation ripple properties. This suggests that the film is a good candidate for controlling properties of Ni45Fe55 thin films, whilst maintaining a high magnetic moment density.<br/><br/>Micromagnetic modelling of …
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Pulsed Laser Deposited Iron Garnet Thin Films for Spintronics
… and their growth with perpendicular magnetic anisotropy (PMA) which promote fast domain wall dynamics. Additionally, selection of rare earth ion and substitution of cations in various sublattices of iron garnets enables tuning of their saturation magnetization, magnetocrystalline anisotropy, …
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An Investigation of the Structural and Magnetic Transitions in Ni-Fe-Ga Ferromagnetic Shape Memory Alloys
… boundaries, elastic strain, applied stress, magnetocrystalline anisotropy, magnetic domain walls, magnetostatic potential, and applied magnetic fields. The time-dependent Ginzburg-Landau and Landau-Lifshitz kinetic continuum equations are employed to track the microstructural and magnetic …
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Current Induced Magnetisation Dynamics in Ferromagnetic Nanowires
… parameters, material composition, magnetic anisotropy, and external fields. Arrays of magnetic nanowires can also be synthesised with high degree of uniformity and with controlled anisotropy using template assisted electrodeposition methods making them more accessible. Furthermore, metallic …
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Structure, microstructure and magnetic properties of electrodeposited Co and Co-Pt in different nanoscale geometries
… magnetic properties are strongly affected by the magnetocrystalline anisotropy of the hexagonal phase that competes with the shape anisotropy of the thin film geometry. Co-Pt nanowires have been prepared within alumina templates at different deposition potentials between -0.6 and -0.9VSCE changing …
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Density-Functional Theory+Dynamical Mean-Field Theory Study of the Magnetic Properties of Transition-Metal Nanostructures
… have carried out a systematic study of magnetic anisotropy in bimetallic L10 FePt nanoparticles (20-484 atoms) by using two DFT-based approaches: direct and the torque method. We find that the magnetocrystalline anisotropy (MCA) of FePt clusters is larger than that of the pure Fe and Pt ones. We …
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Modifying the magnetic properties of Laves phase intermetallic multilayers and films by nano-patterning and ion implantation
… of ~ 1017 Ar+ ions cm-2, the magnetoelastic anisotropy (dominant at room temperature in the epitaxially grown films) is reduced to such an extent that the intrinsic magnetocrystalline anisotropy begins to dominate. Thus Ar+ ion implantation serves to alter the easy and hard axes of …
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Optics and Optoelectronics of Atomically Thin Magnets and Semiconductors
… be ferromagnetic insulators with large predicted magnetocrystalline anisotropy, essential in order to stabilize low dimensional magnetic order against thermal fluctuations. Optical characterization of monolayer CrI3 reveals robust ferromagnetic behavior, while bilayer and trilayer flakes show …
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Magnetische Anisotropie und Spintransport in magnetoelektronischen Schichtsystemen und Nanostrukturen
… in these fields. The focus lies on the magnetic anisotropy and preparation of magnetotransport structures.The theoretical basis of magnetic anisotropy and magnetotransport is explained in chapters 1 and 2. Experimental methods and setups used for this work are introduced in chapter 3. In chapter …
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Pattern formation and magnetism in pulsed laser-induced self-organized nanostructures from single and bilayer metallic films
… force microscopy technique, the magnetic anisotropy of individual nanoparticles was determined. The most important discovery was a size-dependent single-domain magnetic anisotropy due to which, smaller particles had an in-plane magnetic orientation while larger particles were out-of-plane. …
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Phase relations, single crystal growth, and characterization of metallic antiferromagnets
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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