Influence of Heat Treatment Conditions on the Magnetoresistive Properties of Three-layer Structures Fe0,2Co0,8/Cu/Fe0,2Co0,8

Saltykov, D. I.; Shkurdoda, Yu. O.; Protsenko, I. Yu.

doi:10.21272/jnep.10(4).04031

Cited by 11 publications

(8 citation statements)

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“…This system can be presented as three-layer FM/NM/FM with an additional protective layer. This result is close to those presented in Ref [15]. for a similar system Fe0.2Co0.8/Cu/Fe0.2Co0.8.For the as-deposited [Py/Ag]n/S system at n = 8, 16 (Fig.2c, d), a completely different type of MR(B) dependence was observed.…”

supporting

confidence: 91%

Magnetoresistive Properties of Multilayer Film Systems Based on Permalloy and Silver

Pazukha

Shuliarenko

Dolgov-Gordiichuk

et al. 2021

Phys. Chem. Solid St.

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In this paper, the experimental investigation focuses on the magnetoresistive properties of nanosized film systems. Their structure changes from layered to granular due to transition from bilayer FM/NM (FM is a ferromagnetic material, NM is a nonmagnetic material) to [FM/NM]n multilayer film at a constant total thickness of samples. As ferromagnetic and nonmagnetic materials were chosen permalloy Ni80Fe20 (Py) and Ag, respectively. It was demonstrated that the shape of the field dependences of magnetoresistance depends on the number of bilayer Py/Ag. For as-deposited [Py/Ag]n/S at n = 8, 16, the transition from the antiferromagnetic ordering of magnetic moments to ferromagnetic one occurs under an external magnetic field. As a result, the resistivity of the samples reduced, and the giant magnetoresistive effect was realized. The increase of the number of bilayers repeats from 2 to 16 at the unchanged total thickness of the system leads to the growth of the magnetoresistance from 0.1 % to 0.35 %. During annealing up to 600 K, the magnetoresistive effect is reduced, but it does not disappear completely

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supporting

confidence: 91%

Magnetoresistive Properties of Multilayer Film Systems Based on Permalloy and Silver

Pazukha

Shuliarenko

Dolgov-Gordiichuk

et al. 2021

Phys. Chem. Solid St.

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“…The aim of this work is to study the phase state and crystal structure, diffusion processes and magnetoresistive properties for asdeposited and annealed FexСо1−x (x ≅ 0.5) film alloys and three-layer systems on their basis in a wide range of thicknesses as the magnetic (dF) layers and Cu nonmagnetic (dN) layer. Note that it is a logical continuation of our previous study [9] of the crystal structure and magnetoresistive properties of similar FexСо1−x/Cu/FeхCo1−х/S three-layer structures.…”

Section: Introductionsupporting

confidence: 73%

Phase State, Crystal Structure, Diffusion Processes and Magnetoresistance of Three-Layer Structures Based on Fe$_x$Со$_{1-x}$ ($x \cong$ 0.5) and Cu

Saltykov¹,

Shkurdoda²,

Protsenko³

2019

Metallofiz. Noveishie Tekhnol.

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The comprehensive analysis of the phase state, crystal structure and magnetoresistive properties of three-layer films based on alloy FeхСо1−x (x ≅ 0.5) and Cu is done. As shown, a phase state of as-deposited and annealed to 700 K films corresponds to the b.c.c. FeхСо1−x alloy (single-layer films) or b.c.c. FeхСо1−x + f.c.c. solid solution of Fe and Co atoms, which isomorphic replace each other in the Cu lattice (three-layer film). Annealing at the temperature of 700 K does not lead to complete mixing of the layers, their original order maintained. For as-deposited three-layer film systems, the isotropic field dependences with maximum values of magnetoresistance (MR) (0.3%) for dF ≅ 30 nm (magnetic layers) and dN ≅ 5 nm (nonmagnetic layer) are fixed. The process of heat treatment of three-layer samples with dF ≅ 20-30 nm, dN ≅ 4-15 nm at a temperature of 550 K leads to 4-6 times increase of isotropic MR. Further annealing at a temperature of 700 K causes the appearance of anisotropic magnetoresistance.

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“…Substantiation of the presence of temperature intervals are given. [ 18 ] Extrapolation of the site I to 0 K makes it possible to estimate the value of the residual resistance ρ res , which is associated with the scattering of conduction electrons by defects in the crystal structure, grain boundaries and interfaces (in the case of (1) and (3) dependencies). Since these mechanisms of electron scattering are not sensitive to temperature, the site I is practically a horizontal line and is extrapolated to a value of ρ (0) = (2.7–6.5) × 10 −7 Ohm m. Sector III is associated with the high‐temperature electron–phonon interaction, since at T → 0 K it is extrapolated, as well as the low‐temperature electron–phonon interaction, to 0 K. The site II on the dependence ρ ( T ) is logically linked to the magnetic interaction.…”

Section: Resultsmentioning

confidence: 99%

The Effect of the Structural‐Phase State and Diffusion Processes on Electrical Conductivity of Nanocrystalline Fe_xCo₁₀₀₋_x/Cu/ Fe_xCo₁₀₀₋_x Thin Films (0 < x < 100)

Saltykov

Shumakova

Pazukha

et al. 2020

Crystal Research and Technology

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The complex investigation of the crystal, diffusion processes, and electrical conductivity of Fe x Co 100−x (0 < x < 100) film alloys and Fe x Co 100−x /Cu/Fe x Co 100−x /Sub three-layer films with a ferromagnetic layer thickness d F = 20-50 nm and a nonmagnetic layer thickness d N = 2-30 nm has been carried out. For both as-deposited and annealed at 700 K films at x = 50, 80 at%, the phase composition corresponds to bcc-Fe x Co 100−x (single-layer films) or bcc-Fe x Co 100−x + fcc-solid solution of Fe and Co atoms that isomorphically replace each other in the Cu lattice (three-layer film). At x = 20 at%, the phase composition of as-deposited single-layer films corresponds to bcc-Fe x Co 100−x + hcp-Co and bcc-Fe x Co 100−x + fcc-Cu + hcp-Co in the case of three-layer films. After heat treatment at 700 K, the phase composition corresponds to bcc-Fe x Co 100−x + fcc-Co (single-layer films) and bcc-Fe x Co 100−x + fcc-s.s. Cu (Fe, Co) (three-layer film). For three-layer samples with d F = 30-50 nm, d N = 10-30 nm, annealing at 700 K does not lead to complete mixing of the layers, their original order is preserved. In the temperature dependence of the resistivity, three characteristic regions, where the various electron scattering mechanisms dominate, are distinguished and grounded.

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Influence of Heat Treatment Conditions on the Magnetoresistive Properties of Three-layer Structures Fe0,2Co0,8/Cu/Fe0,2Co0,8

Cited by 11 publications

References 0 publications

Magnetoresistive Properties of Multilayer Film Systems Based on Permalloy and Silver

Magnetoresistive Properties of Multilayer Film Systems Based on Permalloy and Silver

Phase State, Crystal Structure, Diffusion Processes and Magnetoresistance of Three-Layer Structures Based on Fe$_x$Со$_{1-x}$ ($x \cong$ 0.5) and Cu

The Effect of the Structural‐Phase State and Diffusion Processes on Electrical Conductivity of Nanocrystalline Fe_xCo₁₀₀₋_x/Cu/ Fe_xCo₁₀₀₋_x Thin Films (0 < x < 100)

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Influence of Heat Treatment Conditions on the Magnetoresistive Properties of Three-layer Structures Fe0,2Co0,8/Cu/Fe0,2Co0,8

Cited by 11 publications

References 0 publications

Magnetoresistive Properties of Multilayer Film Systems Based on Permalloy and Silver

Magnetoresistive Properties of Multilayer Film Systems Based on Permalloy and Silver

Phase State, Crystal Structure, Diffusion Processes and Magnetoresistance of Three-Layer Structures Based on Fe$_x$Со$_{1-x}$ ($x \cong$ 0.5) and Cu

The Effect of the Structural‐Phase State and Diffusion Processes on Electrical Conductivity of Nanocrystalline FexCo100−x/Cu/ FexCo100−x Thin Films (0 < x < 100)

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The Effect of the Structural‐Phase State and Diffusion Processes on Electrical Conductivity of Nanocrystalline Fe_xCo₁₀₀₋_x/Cu/ Fe_xCo₁₀₀₋_x Thin Films (0 < x < 100)