Voltage drop due to longitudinal spin accumulation across the ballistic domain wall

Fallahi, Vahid; Safaei, Reza

doi:10.1103/physrevb.94.064426

Cited by 6 publications

(3 citation statements)

References 44 publications

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“…In order to calculate the transmission amplitudes, We first assume the incoming wave to be entirely "up" and then consider purely "down" spin state. The full wave function in the scattering and its surrounding regions Ψ (S) (x, z) = ∞ mx=1 Φ σ mx (z) f mx (x) can be obtained numerically by solving the second-order differential equations that satisfy the following boundary conditions at z = ±L z , sufficiently far from the scattering region [19]:…”

Section: Theoretical Considerations and Computational Methodsmentioning

confidence: 99%

“…Furthermore, it has been revealed that the effect of both mechanisms, i.e. spin mistracking and spin accumulation, on the domain wall conductance could be dramatically modified by the spin-orbit couplings in low-dimensional systems [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we obtain the properties of coherent states transmitted through a magnetic domain wall in a 2D nanoconstriction. Similar to the previous works [19,40], the analysis is done by introducing an algorithm to solve the coupled spin channels Schrödinger equation with mixed Dirichlet-Neumann boundary conditions applied far from the domain wall. We also introduce the modified chemical potentials at the ferromagnetic contact probes and develop the Landauer-Büttiker approach to include the spin polarization effects in antiparallel-aligned ferromagnetic leads.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Non-integer spin-polarized conductance in multichannel magnetic point contacts

Fallahi

Nazari-Golshan

2019

Eur. Phys. J. B

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The ballistic conductance of a geometrically confined head-to-head 180 • domain wall at a magnetic point contact in a two-dimensional (2D) metallic nanowire is studied theoretically. The ballistic conductance is computed by introducing the modified Landauer-Büttiker formalism in which the spin polarization effects are included. The analysis is based on coherent scattering of the carriers by the spindependent potential associated with the wall structure. The transmission properties of coherent states are obtained by introducing an algorithm to solve the coupled spin channels Schrödinger equation with mixed Dirichlet-Neumann boundary conditions applied far from the domain wall. Non-integer values for the conductance have been observed, due to the modified chemical potentials at the ferromagnetic contact probes. It has been shown that the dips in conductance arise when the electrons are partially polarized in the ferromagnetic leads, due to the formation of spin-dependent chemical potential.

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Section: Theoretical Considerations and Computational Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Non-integer spin-polarized conductance in multichannel magnetic point contacts

Fallahi

Nazari-Golshan

2019

Eur. Phys. J. B

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Numerical Investigation of Domain Wall Resistance in Magnetic Point Contacts: a New Algorithm for inhomogeneous Magnetization Textures

Fallahi

2017

J Supercond Nov Magn

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Calculation of domain wall resistance in magnetic nanowire

Boonruesi

Chureemart

2019

Applied Physics Letters

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The enhancement of domain wall resistance (DWR) in spintronic devices containing the domain wall is required for a full understanding since it represents the efficiency of spin transport and contributes to magnetoresistance phenomena. In this work, we theoretically investigate the effect of the domain wall width, injected current density, and temperature on DWR in magnetic nanowire by using the generalized spin accumulation model based on the Zhang, Levy, and Fert approach. The proposed model allows us to deal with a multilayer system with arbitrary orientation of magnetization. In addition, the temperature effect can be taken into account by considering the spin-dependent resistivity of the ferromagnet at any finite temperature. This leads to the calculation of temperature variation of spin transport parameters, and it eventually allows us to calculate the thermal effect on spin accumulation. The spin transport behavior and DWR can be calculated directly from the gradient of spin accumulation and spin current within the wall. The results show the increase in DWR with temperature as the thermal effect causes the reduction of transport parameters.

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Voltage drop due to longitudinal spin accumulation across the ballistic domain wall

Cited by 6 publications

References 44 publications

Non-integer spin-polarized conductance in multichannel magnetic point contacts

Non-integer spin-polarized conductance in multichannel magnetic point contacts

Numerical Investigation of Domain Wall Resistance in Magnetic Point Contacts: a New Algorithm for inhomogeneous Magnetization Textures

Calculation of domain wall resistance in magnetic nanowire

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