Pure spin-current-induced magnetization switching

2008 ◽  
Author(s):  
T. Yang ◽  
T. Kimura ◽  
J.-B. Laloë ◽  
Y. Otani
Keyword(s):  
Spin Current ◽  
Pure Spin ◽  
Magnetization Switching

scholarly journals Magnetization switching of a perpendicular nanomagnet induced by vertical nonlocal injection of pure spin current

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hirofumi Suto ◽  
Tazumi Nagasawa ◽  
Taro Kanao ◽  
Kenichiro Yamada ◽  
Koichi Mizushima
Keyword(s):  
Spin Injection ◽  
Spin Current ◽  
Pure Spin ◽  
Spin Torque ◽  
Device Structure ◽  
Magnetization Switching ◽  
Spintronic Devices ◽  
Perpendicular Magnetization ◽  
Vertical Injection ◽  
Current Flows

AbstractInjection of pure spin current using a nonlocal geometry is a promising method for controlling magnetization in spintronic devices from the viewpoints of increasing freedom in device structure and avoiding problems related to charge current. Here, we report an experimental demonstration of magnetization switching of a perpendicular magnetic nanodot induced by vertical injection of pure spin current from a spin polarizer with perpendicular magnetization. In comparison with direct spin injection, the current amplitude required for magnetization switching is of the same order and shows smaller asymmetry between parallel-to-antiparallel and antiparallel-to-parallel switching. Simulation of spin accumulation reveals that, in the case of nonlocal spin injection, the spin torque is symmetric between the parallel and antiparallel configuration because current flows through only the spin polarizer, not the magnetic nanodot. This characteristic of nonlocal spin injection is the origin of the smaller asymmetry of the switching current and can be advantageous in spintronic applications.

PERFECT ALLOYS FOR SPIN HALL CURRENT-INDUCED MAGNETIZATION SWITCHING

SPIN ◽  
2012 ◽  
Vol 02 (02) ◽  
pp. 1250010 ◽  
Author(s):  
MARTIN GRADHAND ◽  
DMITRY V. FEDOROV ◽  
PETER ZAHN ◽  
INGRID MERTIG ◽  
YOSHICHIKA OTANI ◽  
...  
Keyword(s):  
Hall Effect ◽  
Noble Metals ◽  
Spin Diffusion ◽  
Spin Current ◽  
Material Design ◽  
Spin Hall Effect ◽  
Pure Spin ◽  
Magnetization Switching ◽  
Hall Angle ◽  
Electronic Measurement

We propose a device that allows for magnetization switching in nanomagnets by means of a pure spin current induced by the spin Hall effect. For this purpose we combine the ideas of magnetization switching of a ferromagnet by a spin current produced via the spin accumulation at a ferromagnet/nonmagnet interface with the electronic measurement of the direct spin Hall effect, and the theoretical material design to identify systems with a large spin Hall angle and an appropriate spin diffusion length. We will discuss the device design with respect to the size of the charge and spin currents. Based on ab initio calculations, we predict dilute alloys ideally suited for this application. Noble metals with single-sheeted Fermi surfaces, doped with either heavy impurities like Bi and Pb in Cu or Bi in Ag and light impurities like C and N in Au , seem to be the best candidates for a spin Hall angle larger than 5%.

scholarly journals Pure spin photocurrent in non-centrosymmetric crystals: bulk spin photovoltaic effect

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Haowei Xu ◽  
Hua Wang ◽  
Jian Zhou ◽  
Ju Li
Keyword(s):  
Mirror Symmetry ◽  
Photovoltaic Effect ◽  
Transition Metal Dichalcogenides ◽  
Spin Current ◽  
Pure Spin ◽  
Light Illumination ◽  
Metal Dichalcogenides ◽  
Critical Components ◽  
Topological Crystalline Insulator

AbstractSpin current generators are critical components for spintronics-based information processing. In this work, we theoretically and computationally investigate the bulk spin photovoltaic (BSPV) effect for creating DC spin current under light illumination. The only requirement for BSPV is inversion symmetry breaking, thus it applies to a broad range of materials and can be readily integrated with existing semiconductor technologies. The BSPV effect is a cousin of the bulk photovoltaic (BPV) effect, whereby a DC charge current is generated under light. Thanks to the different selection rules on spin and charge currents, a pure spin current can be realized if the system possesses mirror symmetry or inversion-mirror symmetry. The mechanism of BSPV and the role of the electronic relaxation time $$\tau$$ τ are also elucidated. We apply our theory to several distinct materials, including monolayer transition metal dichalcogenides, anti-ferromagnetic bilayer MnBi2Te4, and the surface of topological crystalline insulator cubic SnTe.

scholarly journals Dynamically generated pure spin current in single-layer graphene

2013 ◽  
Vol 87 (14) ◽  
Author(s):  
Zhenyao Tang ◽  
Eiji Shikoh ◽  
Hiroki Ago ◽  
Kenji Kawahara ◽  
Yuichiro Ando ◽  
...  
Keyword(s):  
Spin Current ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Pure Spin ◽  
Layer Graphene

Modulation of magnetization dynamics in an epitaxial Heusler ferromagnet due to pure spin current in a laterally configured structure

2018 ◽  
Vol 30 (25) ◽  
pp. 255802
Author(s):  
Soichiro Oki ◽  
Yuta Sasaki ◽  
Yuichi Kasatani ◽  
Shinya Yamada ◽  
Shigemi Mizukami ◽  
...  
Keyword(s):  
Spin Current ◽  
Pure Spin ◽  
Magnetization Dynamics
Sign in / Sign up

Export Citation Format

Share Document