Spin transport parameters in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ni</mml:mi></mml:mrow><mml:mn>80</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Fe</mml:mi></mml:mrow><mml:mn>20</mml:mn></mml:msub><mml:mo>/</mml:mo><mml:mi mathvariant="normal">Ru</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ni</mml:mi></mml:mrow><mml:mn>80</mml:mn></mml

Gómez, J.; Tedlla, B. Zerai; Álvarez, N.; Alejandro, G.; Goovaerts, E.; Butera, A.

doi:10.1103/physrevb.90.184401

Cited by 43 publications

(34 citation statements)

References 33 publications

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“…So far no spin mixing conductance values have been reported for FeCoSi/Ru bilayer systems in the literature. However, the reported g ↑↓ values for similar ferromagnet/non-magnetic metal bilayer systems such as CoFeB/Pt (4 × 10 15 cm −2 ), 30 NiFe/Ru (3.8 × 10 15 cm −2 ), 28 and CoFe/Pt (4.0 × 10 15 cm −2 ) 31 are very close despite the material differences in each system. Thus we expect the spin mixing conductance of our system to be of the same order and used g ↑↓ ≈ 4.0 × 10 15 cm −2 in our estimate.…”

Section: Fmr Measurement Resultsmentioning

confidence: 89%

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Thickness dependence of dynamic magnetic properties of soft (FeCo)-Si alloy thin films

Abe

Nakano

et al. 2019

Phys. Rev. B

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Fe 69 Co 26 Si 5 alloy thin films of various thicknesses were deposited on MgO(100) single crystal substrates by magnetron sputtering at 230 ℃ substrate temperature. The thickness dependence of the dynamic magnetic properties was investigated using broadband ferromagnetic resonance (FMR). The X-ray diffraction (XRD) results indicate that all films are of the bcc structure with an in-plane epitaxial alignment of [100] FeCoSi // [110] MgO. The exchange constant was determined from the field shift between the uniform precession FMR mode and the first order perpendicular standing spin wave (PSSW) resonance mode in the FMR spectra. The effective damping parameter decreases dramatically with increasing film thickness up to 16 nm due to the decrease of the spin pumping contribution and then remains relatively constant as the film thickness increases. In-plane angle dependent FMR measurements reveal that the in-plane anisotropy of these films are dominated by a four-fold magnetic anisotropy, which increases sharply with increasing film thickness up to 16 nm and then shows a slightly decreasing trend as the film thickness increases. In-plane angular dependence of the FMR linewidth shows a strong two-magnon scattering contribution.

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Section: Fmr Measurement Resultsmentioning

confidence: 89%

“…The significant increase of the effective damping parameter increase for the 4 nm thick film has two potential origins: two-magnon scattering and spin pumping. A rough estimation of the spin pumping contribution to the effective parameter for the 4 nm thick film using equation 28…”

Section: Fmr Measurement Resultsmentioning

confidence: 99%

Thickness dependence of dynamic magnetic properties of soft (FeCo)-Si alloy thin films

Abe

Nakano

et al. 2019

Phys. Rev. B

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“…7-9 They were followed by reports on similar observations of pumping into different materials [10][11][12][13] , including prominent semiconductors GaAs 14 , Si 15,16 , Ge 17 , and, most recently, graphene. 18 Experimental results on the electric field generated due to ISHE , E ISHE , are analyzed using the relation E ISHE ∝ J (s) × σ, where J (s)…”

Section: Introductionmentioning

confidence: 98%

Spin pumping from a ferromagnet into a hopping insulator: Role of resonant absorption of magnons

2015

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Motivated by recent experiments on spin pumping from a ferromagnet into organic materials in which the charge transport is due to hopping, we study theoretically the generation and propagation of spin current in a hopping insulator. Unlike metals, the spin polarization at the boundary with ferromagnet is created as a result of magnon absorption within pairs of localized states and it spreads following the current-currying resistor network (although the charge current is absent). We consider a classic resonant mechanism of the ac absorption in insulators and adapt it to the absorption of magnons. A strong enhancement of pumping efficiency is predicted when the Zeeman splitting of the localized states in external magnetic field is equal to the frequency of ferromagnetic resonance. Under this condition the absorption of a magnon takes place within individual sites.

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“…These effects can be used to estimate microscopic parameters related to the transport properties of FM/ML systems. For example, the spin diffusion length (k SD ), the spin Hall angle (H SH ) and the spin mixing conductance (g "# ) provide a way to determine the spin-to-charge current conversion efficiency in different 5d transition metal elements such as Pt 13,14 or Ta, 15,16 which determines the suitable candidate for technological applications. The strong SOC in these transition metals is responsible for the ISHE, which converts a pure spin current into a transversal charge current according to…”

Section: Introductionmentioning

confidence: 99%

Pure spin current manipulation in antiferromagnetically exchange coupled heterostructures

Avilés-Félix

Butera

Gonzalez-Chavez

et al. 2018

Journal of Applied Physics

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We present a model to describe the spin currents generated by ferromagnet/spacer/ferromagnet exchange coupled trilayer systems and heavy metal layers with strong spin-orbit coupling. By exploiting the magnitude of the exchange coupling (oscillatory RKKY-like coupling) and the spinflop transition in the magnetization process, it has been possible to produce spin currents polarized in arbitrary directions. The spin-flop transition of the trilayer system originates pure spin currents whose polarization vector depends on the exchange field and the magnetization equilibrium angles. We also discuss a protocol to control the polarization sign of the pure spin current injected into the metallic layer by changing the initial conditions of magnetization of the ferromagnetic layers previously to the spin pumping and inverse spin Hall effect experiments. The small differences in the ferromagnetic layers lead to a change in the magnetization vector rotation that permits the control of the sign of the induced voltage components due to the inverse spin Hall effect. Our results can lead to important advances in hybrid spintronic devices with new functionalities, particularly, the ability to control microscopic parameters such as the polarization direction and the sign of the pure spin current through the variation of macroscopic parameters, such as the external magnetic field or the thickness of the spacer in antiferromagnetic exchange coupled systems.

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Spin transport parameters inNi80Fe20/RuandNi80

Cited by 43 publications

References 33 publications

Thickness dependence of dynamic magnetic properties of soft (FeCo)-Si alloy thin films

Thickness dependence of dynamic magnetic properties of soft (FeCo)-Si alloy thin films

Spin pumping from a ferromagnet into a hopping insulator: Role of resonant absorption of magnons

Pure spin current manipulation in antiferromagnetically exchange coupled heterostructures

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