Perpendicular magnetic anisotropy of Pd/Co- and Pd/Ni-multilayers

Takahashi, Hirokazu; Fukatsu, S.; Tsunashima, S.; Uchiyama, Susumu

doi:10.1016/0304-8853(92)91568-e

Cited by 14 publications

(10 citation statements)

References 8 publications

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“…For investigations of the latter contribution, the Ni͞Pt and Ni͞Pd systems are particularly suitable because of their large misfit. This was studied in detail by Takahashi et al 5 They found higher effective anisotropies in [100] oriented Ni͞Pd multilayers than in similar [111] oriented multilayers, and explained this in terms of the orientational dependence of the magnetostriction constant.…”

Section: Introductionmentioning

confidence: 81%

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Structural properties of molecular beam epitaxy grown Ni/Pt superlattices

et al. 1997

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We find that the [Ni 3.2nm Pt 1.6nm ] 3 15 and [Ni 3.2nm Pt 0.8nm ] 3 15 multilayers are semicoherent and display a columnar morphology. From both the period of the moiré fringes and the positions of the diffraction peaks in electronic (plan-view and crosssection geometries) and x-ray diffraction patterns, one deduces that the nickel is relaxed (at least in the error bars of all our measurements), whereas the platinum remains slightly strained ͑ഠ21%͒. The interfaces are sharp; no intermixing takes place giving rise to neat contrasts in transmission electron microscopy (TEM) and to high intensities of the superlattice peaks in the growth direction in both diffraction techniques. The relaxation of the interfacial misfit occurs partially through misfit dislocations, partially through the strain of platinum. A quasiperiodic twinning occurs at the interfaces, the stacking fault which forms the twin being the most often located at the interface Pt͞Ni, i.e., when a Pt layer begins to grow on the Ni layer. The simulation of the u͞2u superlattice peak intensities takes into account the columnar microstructure. It shows that the roughness is predominantly at medium scale with a fluctuation of about 12.5% for Ni layers and negligible for Pt layers.

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Section: Introductionmentioning

confidence: 81%

“…(2), we get 0.6% < r < 1.1% . (5) Moreover, from the area of the two peaks, we can evaluate the relative thickness of Ni and Pt layers. Correcting the intensities from the diffusion factors and width differences, we get e Ni ͞e Pt 1.8 6 0.4.…”

Section: A Structure Inside the Layersmentioning

confidence: 99%

Structural properties of molecular beam epitaxy grown Ni/Pt superlattices

et al. 1997

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“…Electric and magnetic behavior of the system Ni-Pd alloys were studied in the papers [7,8]. Perpendicular magnetic anisotropy of Pd/Ni-multilayers (MLs) with (111) and (100) orientations strongly depends on the crystal orientation.…”

Section: Introductionmentioning

confidence: 99%

Effects of recrystallization annealing on mechanical properties of cold-rolled PdNi5 wires

Ivanović¹,

Trumić²,

Ivanov³

et al. 2016

Metall Mater Eng

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The aim of this investigation was to determine the influence of the recrystallization temperature and recrystallization time on the microstructure and mechanical properties of the PdNi5 alloy subjected to cold deformation in the process of rolling at a constant deformation degree. The samples of PdNi5 alloy were recrystallization annealed within the temperature range of 200-1000ºC and annealing time range of 20-45 min after cold rolling with deformation degree of 97%. The tensile test was carried out using universal material testing machine. The hardness was also measured on the combined device for measuring Vickers and Brinell hardness. Metallographic observations were performed on an optical microscope. The analysis of the results of investigations regarding the microstructural changes and corresponding mechanical properties of cold-rolled PdNi5 strips shows that annealing temperature of 500ºC was sufficient to activate the energy for various recrystallization processes causing a change in the mechanical properties of cold-rolled PdNi5 strips. The annealing time, at constant annealing temperature, almost did not affect a recrystallization temperature and the mechanical properties of the cold-rolled PdNi5 strips.

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“…To know atomic arrangement of magnetic layers is important for understanding the microscopic origin of PMA. For Ni/Pd superlattices, it was found that the value of the PMA of the fcc (100) film is larger than that of fcc (111) film [1,2]. We have reported [3,4] the strain at interface of NiPd superlattices for two different crystal orientations: fcc (111) and fcc (loo), by employing the molecular dynamics (MD) method using the embedded atom method ( E M ) which included a many-body term in the potential function [5].…”

Section: Introductionmentioning

confidence: 99%

The structure at the interface of Ni/Pd bilayer films with different deposition sequences estimated from molecular dynamics simulation

et al. 1999

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Molecular dynamics simulations of the formation process of N e d bilayer films were performed by employing the embedded atom method with high (10 eV) and low (0.1 eV) kinetic energies of incident atoms for two different crystal orientations: fcc (111) and fcc (100) of Ni or Pd substrate. The tendencies of the film formation process and the interdiffusion at the interface were similar in both the (111) and (100) cases. However, the strain at the interface of films on the (100) substrate was larger than that on the (111) substrate. At the case of Pd deposited on Ni (loo), the Pd film grew with the (111) symmetry and partially observed Ni(100)-c(16 x 2) structure. The crystal orientation of Pd layer varied from the value of the strain in Ni (100) under layer. In the crystal orientation dependencies, the value of strain in magnetic layer at interfaces derived from simulations corresponds well to the experimental value of perpendicular magnetic anisotropy.

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Perpendicular magnetic anisotropy of Pd/Co- and Pd/Ni-multilayers

Cited by 14 publications

References 8 publications

Structural properties of molecular beam epitaxy grown Ni/Pt superlattices

Structural properties of molecular beam epitaxy grown Ni/Pt superlattices

Effects of recrystallization annealing on mechanical properties of cold-rolled PdNi5 wires

The structure at the interface of Ni/Pd bilayer films with different deposition sequences estimated from molecular dynamics simulation

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