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Tuesday, May 5, 2020 | History

2 edition of Magnetic anisotropy in Ni/V superlattices found in the catalog.

Magnetic anisotropy in Ni/V superlattices

Chung Lu

Magnetic anisotropy in Ni/V superlattices

by Chung Lu

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  • 37 Currently reading

Published .
Written in English

    Subjects:
  • Nickel alloys,
  • Vanadium alloys,
  • Nickel -- Magnetic properties,
  • Vanadium -- Magnetic properties

  • Edition Notes

    Statementby Zhong Lu
    The Physical Object
    Paginationiii, 73 leaves :
    Number of Pages73
    ID Numbers
    Open LibraryOL14424143M

    We report on magnetic and magneto-optic property aspects of nanocrystalline Ni /Pt multilayers grown by e-beam evaporation at room temperature. X-ray diffraction and atomic force microscopy measurements show high degree of multilayer sequencing and formation of nanocrystals with a relatively narrow size distribution. Magneto-optic polar Kerr effect experiments reveal a spin Cited by: 5. Uniaxial Edit. A magnetic particle with uniaxial anisotropy has one easy axis. If the easy axis is in the direction, the anisotropy energy can be expressed as one of the forms: where is the volume, the anisotropy constant, and the angle between the easy axis and the particle's magnetization.

    In this work, we present a simple method to fabricate high quality Ni/NiO multilayers with the use of a single magnetron sputtering head. Namely, at the end of the deposition of each single Ni layer, air is let to flow into the vacuum chamber through a leak valve. Then, a very thin NiO layer (~ 1nm) is formed by natural oxidation. The process is reproducible and the result is the Cited by: 3. The strong dimensionality effect can be commonly explained by the competition between the magnetic anisotropy energy and prominent thermal fluctuations in thinner samples [7,22]. To enhance the Curie temperature of Fe 3 GeTe 2, we geometrically designed FGT/CS superlattices with different periods and thickness.

    The bilayer thickness, ratio of the constituents and the interface quality influence the magnetic properties (magnetic moments and anisotropy) of metallic heterostructures. In particular, magnetic moments in bcc Fe 81 Ni 19 /Co superlattices were found to scale with the interface density thus, implying different magnetic moments at the. We consider a Heisenberg model with single-ion anisotropy for a two- or three-layer magnetic superlattice on a simple cubic lattice. The two (or three) magnetic layers lie in the y–z plane, and the superlattice structure is stacked periodically along the x-direction that is normal to the y–z plane. The nearest neighbouring spins within each sublayer are coupled ferromagnetically by.


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Magnetic anisotropy in Ni/V superlattices by Chung Lu Download PDF EPUB FB2

Single crystal Ni/Co() superlattices have been grown by molecular beam epitaxy. The Ni thickness is 3 ML whereas the Co thickness varies from to 4 ML. The superlattices were studied using magnetometry and ferromagnetic resonance spectroscopy and they all exhibit strong perpendicular Magnetic anisotropy in Ni/V superlattices book the plane magnetic anisotropy.

The maximum magnetocrystalline anisotropy Cited by: The magnetic anisotropy energy (MAE) in FCT Ni(0 0 1) single crystals and in BCT Fe/V(0 0 1) superlattices is determined by ferromagnetic resonance.

Second- and fourth-order anisotropy constants K 2, K 4‖ and K 4⊥ are determined as a function of temperature. We find that the MAE is by orders of magnitude enhanced due to the tetragonal by: 7.

Purchase Magnetic Thin Films, Multilayers and Superlattices, Volume 16 - 1st Edition. Print Book & E-Book. ISBNBook Edition: 1. The magnetic domain wall energy density σ W of a Ni/Co superlattice possessing perpendicular magnetic anisotropy was determined using the magnetic domain theory derived by Kooy and Enz ().

To determine σ W, we obtained the saturation magnetization, magnetic domain period, and perpendicular magnetic anisotropy energy by individual measurements.

Using the magnetic Cited by: 2. Magnetic moments above T C, orbital and spin contributions to the magnetic moment which are in temperature independent, and the magnetic anisotropy energy (MAE) as a function of temperature can be determined. Here we present results for the magnetization, MAE and the gyromagnetic ratio of Fe 2 /V 5 and Fe 4 /V 4 superlattices.

It is demonstrated that the. We have fabricated Cu‐Ni superlattices with exclusive [] modulating orientation by using a dc magnetron sputtering system. The layer thicknesses of both Cu and Ni range from 5 to Å.

The high quality of the samples is confirmed by the intense satellite peaks in the x‐ray diffraction. The spontaneous magnetization at 5 K, which is found to be inversely proportional to the Ni Cited by: Single crystal Ni/Co superlattices have been grown by molecular beam epitaxy.

The Ni thickness is 3 ML whereas the Co thickness varies from to 4 ML. The superlattices were studied using magnetometry and ferromagnetic resonance spectroscopy and they all exhibit strong perpendicular to the plane magnetic anisotropy.

Perpendicular magnetic anisotropy (PMA) is induced in Co/Ni multilayers when they are grown on a () textured Au seed layer, provided it is at least 2 nm thick.

The anisotropy increases with increasing Au thickness due to improved by: Lecture 2: Magnetic Anisotropy Energy(MAE) ≈ 1µeV/atom is very small comparedto ≈ 10 eV/atom total energy but all important Characteristic energiesof metallic ferromagnets.

binding energy 1 - 10 eV/atom exchange energy 10 - meV/atom cubic MAE (Ni) µeV/atom uniaxial MAE (Co) 70 µeV/ Size: 7MB. The magnetization and the in-plane magnetic anisotropy energy of Fe(15ML)/V(1–12ML) superlattices have been examined and their relation to the growth of the superlattices is.

Magnetic anisotropy field of () Fe/Co superlattices was found to be as high as 1 T, with an in-plane easy axis. First principles calculations within the local spin density approximation show. First-principles investigation of the magnetic anisotropy and magnetic properties of Co/Ni() superlattices Article (PDF Available) in Physical Review B 86(18).

Magnetic Properties of Transition Metal Compounds and Superlattices BY ARVID BRODDEFALK The interlayer exchange coupling and the magnetocrystalline anisotropy energy of Fe/V superlattices were studied.

The coupling strength was found to vary with the In-plane magnetic anisotropy of Fe/V () superlattices A. Broddefalk, P. Nordblad, P.

Moreover, perpendicular magnetic anisotropy (PMA) is observed and can be tuned by the layer thickness n in the superlattices. Enhanced PMA as high as × 10 6 erg/cm 3 is obtained in the n = 1 superlattice, which is considerably higher compared to that in n = 4 and 5 SLs.

Ultrathin [Co/Pt] n superlattice films consisting of –nm-thick Co and Pt sublayers were deposited by sputtering. A large in-plane saturation field (H s) of ~39 kOe and a very large effective perpendicular magnetic anisotropy (K eff) with a magnitude of 10 7 erg/cm 3 were highest K eff was ~ × 10 7 erg/cm films are promising Cited by: 5.

Here n denotes number of repetition of Co/Ni bilayers. The Co/Ni multilayers were grown on Si () substrate at room temperature. Before deposition Si substrate was annealed at K in 30 min. At the bottom of the multilayer system Pt buffer layer was grown with a thickness of 35 å in order to induce by: 8.

Abstract The magnetic anisotropy energy (MAE) in FCT Ni(0 0 1) single crystals and in BCT Fe/V(0 0 1) superlattices is determined by ferromagnetic resonance. Second- and fourth-order anisotropy constants K 2, K 4‖ and K 4⊥ are determined as a function of temperature.

We find that the MAE is by orders of magnitude enhanced due to the. Magnetic properties of ferromagnetic FeCu ‘superlattices’ on Cu() Article (PDF Available) in Philosophical Magazine B 78() November. The structure and magnetic properties of BCC (0 0 1) oriented Fe 81 Ni 19 /Co superlattices grown on MgO(0 0 1) substrates by magnetron sputtering are presented.

The variation of magnetic moment with the composition and with the interface density was investigated. A model in which the magnetic moment per atom at the interfaces is different from that in the interior Cited by: 6.

Field-induced magnetization dynamics in a [Co/Ni] superlattice exhibiting strong perpendicular magnetic anisotropy is studied using Kerr microscopy. We report domain wall velocity over 8 decades within thermally activated, transitory, and flow dynamical regimes. At low field, the thermally activated regime is characterized by dendritic domain growth that differs from the Cited by: 4.

The magnetocrystalline anisotropy energy is generally represented as an expansion in powers of the direction cosines of the magnetization. The magnetization vector can be written M = M s (α,β,γ), where M s is the saturation magnetization.

To characterize the structural and magnetic depth profile, we performed polarized neutron reflectometry (PNR) on as-grown and gated superlattices by ILG in which V was applied for 20 : Di Yi, Yujia Wang, Olaf M. J. van ʼt Erve, Liubin Xu, Hongtao Yuan, Michael J.

Veit, Michael J. Veit.Engineering magnetic anisotropy in two-dimensional systems has enormous scientific and technological implications.

The uniaxial anisotropy universally exhibited by two-dimensional magnets has only two stable spin directions, demanding ° spin switching between states. We demonstrate a previously unobserved eightfold anisotropy in magnetic SrRuO3 monolayers .