Table 1 Main parameters for Calculation.
From: Current-limiting challenges for all-spin logic devices
Parameter | Description | Default value |
|---|---|---|
M s | Saturation magnetization | 9.5 × 105 A/m |
K | Perpendicular magnetic anisotropy energy density | 6.4 × 105 J/m3 |
t F | Free layer thickness of output nano-magnet | 2 nm |
W, L ,t | Width, length and thickness of channel | 10 nm, 20 nm, tG = 0.335 nm |
AR, TR | Aspect Ratio L/W, t/W | 2, 6/5 (copper) |
A C | Nano-magnet area and contact area | 10 × 10 nm2 |
αeff | Effective damping constant | 0.007 |
N x , N y , N z | Demagnetization factors | 0.17, 0.17, 0.66a |
P | Spin polarization factor | 0.5 |
P i | Spin injection (i = 1) or detection (i = 2) efficiency | 50% (0 ~ 100%) |
λG, λCu, λF | Spin diffusion length of graphene, copper and ferro nano-magnet | 3 μm, 400 nm, 5 nm |
ρCu,bulk, ρG, ρF | Resistivity of bulk copper, graphene channel and nano-magnet | 1.7 μΩ· cm, 0.3 kΩb, 20 μΩ · cm |
R i ·W | Contact resistivity for graphene channel in the input (i = 1) or the output (i = 2) | 10 Ω · μm (Tunnel), 1 Ω · μm (Transparent) |
R i ·A | Tunnel contact resistivity for copper channel | 0.02 Ω · μm2 |
Constant | Description | Value |
ħ | Reduced Planck constant | 1.054 × 1034 J·s |
e | Elementary charge | 1.6 × 10−19 C |
μ0 | Vacuum permeability | 1.2566 × 10−6 H/m |
γ | Gyromagnetic ratio | 1.76 × 1011 rad·s−1·T−1 |
