scholarly journals Spin transfer by spin injection between both interfaces of a Ni nanowire

2004 ◽  
Vol 96 (8) ◽  
pp. 4490-4493 ◽  
Author(s):  
J.-E. Wegrowe ◽  
M. Dubey ◽  
T. Wade ◽  
H.-J. Drouhin ◽  
M. Konczykowski
Keyword(s):  
Spin Injection ◽  
Spin Transfer

scholarly journals Magnetization reversal driven by spin injection: A diffusive spin-transfer effect

2008 ◽  
Vol 77 (17) ◽  
Author(s):  
J.-E. Wegrowe ◽  
S. M. Santos ◽  
M.-C. Ciornei ◽  
H.-J. Drouhin ◽  
J. M. Rubí
Keyword(s):  
Magnetization Reversal ◽  
Spin Injection ◽  
Transfer Effect ◽  
Spin Transfer

Spin transfer torques by point-contact spin injection

2009 ◽  
Author(s):  
T. Y. Chen ◽  
Y. Ji ◽  
S. X. Huang ◽  
C. L. Chien ◽  
M. D. Stiles
Keyword(s):  
Spin Injection ◽  
Point Contact ◽  
Spin Transfer

JOINT ACTION OF SPIN-TRANSFER AND SPIN-INJECTION TORQUES IN FERROMAGNETIC JUNCTIONS

2007 ◽  
Vol 06 (05) ◽  
pp. 363-366
Author(s):  
ERNEST EPSHTEIN ◽  
YURI GULYAEV ◽  
PETER ZILBERMAN
Keyword(s):  
Joint Action ◽  
Spin Injection ◽  
Spin Valve ◽  
Spin Transfer ◽  
Simultaneous Action ◽  
Transverse Spin ◽  
Spin Wave Excitations ◽  
Instability Development ◽  
First Time ◽  
A Current

We consider theoretically a current flowing perpendicular to interfaces of a spin-valve type ferromagnetic metallic junction. For the first time a simultaneous action of the two current effects is investigated, namely, the nonequilibrium longitudinal spin injection and the transverse spin surface torque. Dispersion relations for fluctuations are derived and solved under the proper boundary conditions. Joint action of the two effects mentioned lowers the instability threshold, its typical value being 1 × 106–3 × 107 A/cm2. Spin wave excitations may soften near the threshold. A nonlinear problem is solved about steady state arising due to instability development.

Nonlinear Damping Generated by Spin Injection in a Pseudo-spin-valve Structure

2007 ◽  
Vol 998 ◽  
Author(s):  
Min Ren ◽  
Lei Zhang ◽  
Jiuning Hu ◽  
Ning Deng ◽  
Hao Dong ◽  
...  
Keyword(s):  
Spin Relaxation ◽  
Spin Injection ◽  
Magnetic Moments ◽  
Spin Valve ◽  
Nonlinear Damping ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Accumulation ◽  
Magnetic Damping ◽  
Magnetic Dynamic

ABSTRACTThe current induced magnetic dynamics of a nano-scale pseudo-spin-valve (PSV) structure was theoretically studied. The spin relaxation mechanisms and the influence of ferromagnetic/nonmagnetic (FM/NM) interfaces on the current polarization were investigated, and a modified magnetic dynamic equation was developed. Both the free layer's local magnetic moments and itinerant electrons' spins were regarded as a macro-spin, whose movement was resulted from two items: spin relaxation due to the magnetic damping and spin accumulation due to the polarized current. The injected current not only produces a spin transfer torque, but also alters the effective magnetic field, and thus affects the damping. Therefore, the damping is nonlinear and correlated to the current. Based on the analysis of the competition between magnetic damping and spin accumulation, the dynamic behaviors of magnetization switching and oscillation can be explained.

Incoherent spin current

2017 ◽  
Author(s):  
K. Ando ◽  
E. Saitoh
Keyword(s):  
Diffusion Equation ◽  
Spin Density ◽  
Spin Diffusion ◽  
Spin Injection ◽  
Spin Current ◽  
Ferromagnetic Semiconductor ◽  
Electrochemical Potential ◽  
Semiconductor Interface ◽  
Interface Resistance ◽  
Inhomogeneous Spin

This chapter introduces the concept of incoherent spin current. A diffusive spin current can be driven by spatial inhomogeneous spin density. Such spin flow is formulated using the spin diffusion equation with spin-dependent electrochemical potential. The chapter also proposes a solution to the problem known as the conductivity mismatch problem of spin injection into a semiconductor. A way to overcome the problem is by using a ferromagnetic semiconductor as a spin source; another is to insert a spin-dependent interface resistance at a metal–semiconductor interface.

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