Fept anisotropy

Author: xvfk

August undefined, 2024

WebOct 29, 2024 · The face-centered-tetragonal fct τ-phase is responsible for strong anisotropic fields and overall magnetic performance of the Mn-Al magnets, with close similarities to the fct L1 0 phases, which are phases that have been obtained in both FePt and CoPt melt spun alloys [7,8] with strong uniaxial magnetocrystalline anisotropy . WebApr 14, 2005 · The uniaxial magnetic anisotropy energy (MAE) of L 1 0 FePt and Fe 1 − x Mn x Pt, x = 0 − 0.25, was studied from first principles using two fully relativistic computational methods, the full-potential linear muffin-tin orbitals method and the exact muffin-tin orbitals method.It was found that the large MAE of 2.8 meV/f.u. is caused by a …

Materials with perpendicular magnetic anisotropy for magnetic …

WebMar 25, 2011 · We report on anisotropy measurements of FePt thin films prepared at different temperatures and find that the anisotropy increases with increasing chemical … Webthe FePt alloys, the HMF annealing has been reported to induce strain in Fe 3Pt alloy,23 promote disorder-order transformation of FePt nanomaterials,24–26 and alignment of … ataturk dersim katliamcisi

Modulation of magnetocrystalline anisotropy in FePt/PbTiO

WebMar 10, 2024 · Furthermore, under the field-free condition, our FePt single layer system exhibits stable multi-state magnetic switching behavior and nonlinear synaptic characteristics. This work paves the way to realize field-free SOT switching in the L 1 0 -FePt single layer, which will have significant impact on spin memory devices and … WebEnter the email address you signed up with and we'll email you a reset link. WebJul 9, 2024 · Electric-field control of the magnetic anisotropy energy (MAE) using multiferroics materials is a promising method to solve this problem. Based on density … ataturk havaalani transfer

Effects of high magnetic field annealing on FePt nanoparticles …

Current-induced magnetization switching in epitaxial L10-FePt/Cr ...

WebOct 1, 2024 · Keywords: Anisotropy, Monte Carlo, FePt. a) shows the XRD pattern of FePt thin films annealed in the temperature range 250-650 °C at an interval of 100 °C. The existence of (111) peak at 40.92 ... WebNov 3, 2015 · Thickness modulation at the edges of nanostructured magnetic thin films is shown to have important effects on their perpendicular magnetic anisotropy. Thin film wires with tapered edges were made from [Co/Pd] 20 multilayers or L1 0-FePt films using liftoff with a double-layer resist. The effect of edge taper on the reversal process was studied … ataturk egitim hayatiWebIt is well known that in the FePt system, the Pt atoms play an important role in magnetic anisotropy, because the hybridization of Fe orbitals cause spin polarization of Pt … askep ansietas ibu hamil

"WebJun 21, 2024 · Structure and stability. We have considered the 9ML of L1 0-FePt alloy oriented along the [001] direction, which are sandwiched between 5ML-TM (001) and 3ML-MgO(001) (Fig. 1a).To minimize the ... " - Fept anisotropy

Fept anisotropy

Microstructure and magnetic properties of ultrathin FePt granular films ...

WebMar 1, 2024 · We focused on the surface anisotropy of FePt thin films with one surface vacancy, (i.e. 75% surface covering) for either Fe or Pt surface layers termination … WebSep 26, 2008 · Abstract. We report the study of L 1 0 FePt–C nanogranular perpendicular anisotropy films fabricated on oxidized Si substrates with a (100) textured MgO intermediate layer. The addition of a small amount of C (<12%) to a FePt (4 nm) film results in the formation of interconnected FePt particles, while a higher C addition leads to the ...

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WebAug 14, 2013 · Using first-principles density-functional theory calculations, we systematically investigate the magnetic anisotropy of the multilayer system Cu/(FePt) n /MgO, a promising spintronics structure. Particularly, we have studied the influence of the epitaxial strain, thickness of the ferromagnetic layer, and different interfaces on the magnetic anisotropy … WebInterestingly, for samples implanted through patterned masks, the perpendicular anisotropy in the unimplanted region was also lost. This noteworthy observation can be attributed to the displacement of Fe and Pt atoms from the implantation sites to the unimplanted areas, thereby causing a phase disorder transformation from L1(0) to A1 FePt. 展开

WebOct 24, 2016 · To get a reliable ab initio value for the magnetocrystalline anisotropy (MCA) energy of FePt, we employ the full-potential linearized augmented plane … WebApr 1, 2016 · To get a reliable ab-initio value for the magneto-crystalline anisotropy (MCA) energy of FePt, we employ the full-potential linearized augmented plane wave (FLAPW) …

WebIn this study, we investigate the magnetic anisotropy and damping constant of a GdCo alloy, with a Gd concentration of 12–27%. ... M. Tunnel magnetoresistance over 100% in MgO-based magnetic tunnel junction films with perpendicular magnetic L10-FePt electrodes. IEEE Trans. Magn. 2008, 44, 2573–2576. [Google Scholar] WebApr 12, 2024 · In order to achieve an efficient way of magnetic recording, ferromagnets with a strong magneto-crystalline anisotropy (MCA) are highly desired. L 1 0-ordered FePt has been intensively investigated due to its excellent chemical stability and strong uniaxial magnetic anisotropy (K u) up to ∼ 7 × 10 6 J/ m 3. 1–4 1. O. A.

WebAbstract. We carried out first-principle calculations of magnetocrystalline anisotropy of L1 0-FePt thin films terminated by either perfect Fe (Pt) layers or defect surfaces, including vacancies or substituted surface atoms.Inspired by the experimental strategy for determining magnetic anisotropy, we present here a theoretical model for analyzing volume and …

WebSep 5, 2024 · FePt L1 0 NPs have attracted considerable attention because of their extremely high magnetic anisotropy 7 making them especially useful for practical … askep aneurisma otak pdfWebMar 17, 2000 · As the magnetic stability of individual particles scales with the anisotropy constant, K u, and the particle volume, V, small FePt particles may be suitable for future … ataturk deathWebOct 2, 2024 · Electric-field control of the magnetic anisotropy energy (MAE) using multiferroics materials is a promising method to solve this problem. Based on density functional theory, we investigated the effects of the ferroelectric polarization on MAE of FePt/PbTiO 3 multiferroic heterostructures. The MAEs of FePt monolayer with different … askep asfiksia sedangWeba suitable model to solve this puzzle. 3,4 The shape-anisotropy of concave-cube FePt NPs is originated from the over-growth of truncated-cube or cube seeds along the h111i direction, and the Pt content is richer at corner-sites, which leads to the element-distri-bution-anisotropy.5–7 Otherwise, the as-synthesized FePt NP always ataturk fenerbahçeli miWebAbstract: L1 0-FePt/Fe nanocomposite thin films are promising candidates for excellent performance permanent magnets, owing to the large magnetocrystalline anisotropy of FePt (K u =7×10 7 erg/cc [1]) and high saturation magnetization of Fe. The theoretical energy product of FePt/Fe nanocomposite thin films could be up to 90 MGOe [2]. However, the … askep anemia pada ibu hamilWebanisotropy under rotation of the magnetization with respect to the crystallographic axes. Measured AMR of FePt.—A single-crystal FePt (001) film is epitaxially grown on an MgO (001) substrate and patterned into arcuate Hall bars so that the current direction is continuously variable, as schematized in Fig. 1(a). The askep antenatal sdkiWebJan 6, 2024 · The dependence of the degree of order and perpendicular magnetic anisotropy (K u⊥) on magnetic layer thickness (d mag) for FePt granular films with various grain boundary materials (GBMs) were investigated.According to the analysis for granular films with a constant GBM volume of 30 vol%, the order, disorder, and non-epitaxial … askep anemia pada ibu hamil scribd