scholarly journals Spin-current emission governed by nonlinear spin dynamics

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Takaharu Tashiro ◽  
Saki Matsuura ◽  
Akiyo Nomura ◽  
Shun Watanabe ◽  
Keehoon Kang ◽  
...  
Keyword(s):  
Spin Dynamics ◽  
Spin Current ◽  
Current Emission

scholarly journals Spin transport and spin dynamics in antiferromagnets

2021 ◽  
Author(s):  
◽  
Geert Hoogeboom
Keyword(s):  
Magnetic Field ◽  
Heavy Metal ◽  
Spin Transport ◽  
Spin Dynamics ◽  
Magnetic Moments ◽  
Spin Current ◽  
Active Role ◽  
Metal Films ◽  
Alternating Direction ◽  
High Processing

Ferromagnets (FMs) have been a key ingredient in information technology because it is easy to manipulate and read out the magnetization. Antiferromagnets (AFMs) have magnetic moments with alternating direction resulting in negligible magnetization. This gives them high processing and device downscaling features, but this also makes it challenging to manipulate and interact with the AFM order. This thesis studies this interaction with antiferromagnets. NiO AFM order has been read out by electrically injecting spin current via the spin Hall effect in thin heavy metal films. In DyFeO3, both Dy and Fe magnetic moments, their excitation and interaction have been probed. A magnetic field lifts the degeneracy of magnetic excitations with opposite magnon spin, allowing a spin current to be detected nonlocally. The AFM order and the generation of spin current can easily be controlled by an adjacent FM. Thereby, we show that AFMs have the potential to play an active role in spintronics.

scholarly journals Controlled enhancement of spin-current emission by three-magnon splitting

2011 ◽  
Vol 10 (9) ◽  
pp. 660-664 ◽  
Author(s):  
Hidekazu Kurebayashi ◽  
Oleksandr Dzyapko ◽  
Vladislav E. Demidov ◽  
Dong Fang ◽  
A. J. Ferguson ◽  
...  
Keyword(s):  
Spin Current ◽  
Current Emission

scholarly journals Frequency and power dependence of spin-current emission by spin pumping in a thin-film YIG/Pt system

2012 ◽  
Vol 86 (13) ◽  
Author(s):  
V. Castel ◽  
N. Vlietstra ◽  
B. J. van Wees ◽  
J. Ben Youssef
Keyword(s):  
Thin Film ◽  
Spin Current ◽  
Power Dependence ◽  
Spin Pumping ◽  
Current Emission

Experimental observation of the spin Hall effect using spin dynamics

2017 ◽  
Author(s):  
E. Saitoh ◽  
K. Ando
Keyword(s):  
Hall Effect ◽  
Field Component ◽  
Resonance Condition ◽  
Spin Dynamics ◽  
Ferromagnetic Layer ◽  
Spin Current ◽  
Spin Hall Effect ◽  
Microwave Cavity ◽  
Bilayer Film ◽  
Spin Pumping

This chapter describes an experiment on the inverse spin Hall effect (ISHE) induced by spin pumping. Spin pumping is the generation of spin currents as a result of magnetization M(t) precession; in a ferromagnetic/paramagnetic bilayer system, a conduction-electron spin current is pumped out of the ferromagnetic layer into the paramagnetic conduction layer in a ferromagnetic resonance condition. The sample used in the experiment is a Ni81Fe19/Pt bilayer film comprising a 10-nm-thick ferromagnetic Ni81Fe19layer and a 10-nm-thick paramagnetic Pt layer. For the measurement, the sample system is placed near the centre of a TE011 microwave cavity at which the magnetic-field component of the microwave mode is maximized while the electric-field component is minimized.

Femtosecond Laser Induced Spin Dynamics in Single Layer Graphene/CoFeB Thin Films

Nanoscale ◽  
2021 ◽  
Author(s):  
Surya Narayan Panda ◽  
Sudip Majumder ◽  
Samiran Choudhury ◽  
Arpan Bhattacharyya ◽  
Sumona Sinha ◽  
...  
Keyword(s):  
Thin Films ◽  
Spin Dynamics ◽  
Spin Current ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Layer Graphene ◽  
Important Building Block ◽  
Unique Ability

Graphene/Ferromagnet hybrid heterostructure is an important building block of spintronics due to unique ability of graphene to transport spin current over unprecedented distance and possible increase in its spin-orbit coupling...

scholarly journals Hamiltonian and Lagrangian Dynamical Matrix Approaches Applied to Magnetic Nanostructures

2012 ◽  
Vol 2012 ◽  
pp. 1-16 ◽  
Author(s):  
Roberto Zivieri ◽  
Giancarlo Consolo
Keyword(s):  
Magnetic Nanoparticles ◽  
Matrix Method ◽  
Spin Dynamics ◽  
Equations Of Motion ◽  
Normal Modes ◽  
Spin Current ◽  
Magnetic Nanostructures ◽  
Spin Transfer Torque ◽  
Dynamical Matrix ◽  
Dissipative Effects

Two micromagnetic tools to study the spin dynamics are reviewed. Both approaches are based upon the so-called dynamical matrix method, a hybrid micromagnetic framework used to investigate the spin-wave normal modes of confined magnetic systems. The approach which was formulated first is the Hamiltonian-based dynamical matrix method. This method, used to investigate dynamic magnetic properties of conservative systems, was originally developed for studying spin excitations in isolated magnetic nanoparticles and it has been recently generalized to study the dynamics of periodic magnetic nanoparticles. The other one, the Lagrangian-based dynamical matrix method, was formulated as an extension of the previous one in order to include also dissipative effects. Such dissipative phenomena are associated not only to intrinsic but also to extrinsic damping caused by injection of a spin current in the form of spin-transfer torque. This method is very accurate in identifying spin modes that become unstable under the action of a spin current. The analytical development of the system of the linearized equations of motion leads to a complex generalized Hermitian eigenvalue problem in the Hamiltonian dynamical matrix method and to a non-Hermitian one in the Lagrangian approach. In both cases, such systems have to be solved numerically.

Sign in / Sign up

Export Citation Format

Share Document