Spin-Wave Dynamics in Antiferromagnets under Electric Current

2021 ◽  
Vol 1 ◽  
Keyword(s):  
Electric Current ◽  
Spin Wave ◽  
Doppler Effect ◽  
Spin Waves ◽  
Microscopic Analysis ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Wave Dynamics

Electric current causes a Doppler effect in spin waves in ferromagnets through a spin-transfer torque. We report that antiferromagnets allow two such spin-transfer torques and present a microscopic analysis that interpolates ferro- and antiferromagnetic transport regimes.

Strong high-frequency spin waves released periodically from a confined region

2020 ◽  
Vol 91 (3) ◽  
pp. 30601
Author(s):  
Zhen-Wei Zhou ◽  
Xi-Guang Wang ◽  
Yao-Ghuang Nie ◽  
Qing-Lin Xia ◽  
Guang-Hua Guo
Keyword(s):  
Relaxation Time ◽  
Spin Wave ◽  
High Frequency ◽  
Microwave Field ◽  
Spin Waves ◽  
Spin Transfer Torque ◽  
Micromagnetic Simulation ◽  
Spin Transfer ◽  
Limited Region ◽  
Strong Spin

Efficient excitation of spin waves is a key issue in magnonics. Here, by using micromagnetic simulation and analytical analysis, we study the excitation of spin waves confined in a limited region by a microwave field with assistance of spin-transfer torque. The results show that the spin-transfer torque can decrease the effective damping constant and increase the spin wave relaxation time substantially. As a result, the amplitude of the excited spin waves is increased greatly. By periodically lifting and establishing the blocking areas, strong spin-wave pulses are released from the confined region. Such generated spin-wave pulses are much stronger than traditionally excited spin waves, especially for high-frequency spin waves. Our study provides a new method to generate strong high-frequency spin waves.

scholarly journals Nonresonant amplification of spin waves through interface magnetoelectric effect and spin-transfer torque

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Piotr Graczyk ◽  
Maciej Krawczyk
Keyword(s):  
Spin Wave ◽  
Magnetoelectric Effect ◽  
Spin Waves ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Magnetization Dynamics ◽  
Dielectric Thin Film ◽  
Spintronic Devices ◽  
Thin Film Capacitors ◽  
Dynamic Charge

AbstractWe present a new mechanism for manipulation of the spin-wave amplitude through the use of the dynamic charge-mediated magnetoelectric effect in ultrathin multilayers composed of dielectric thin-film capacitors separated by a ferromagnetic bilayer. Propagating spin waves can be amplified and attenuated with rising and decreasing slopes of the oscillating voltage, respectively, locally applied to the sample. The way the spin accumulation is generated makes the interaction of the spin-transfer torque with the magnetization dynamics mode-selective and restricted to some range of spin-wave frequencies, which is contrary to known types of the spin-transfer torque effects. The interfacial nature of spin-dependent screening allows to reduce the thickness of the fixed magnetization layer to a few nanometers, thus the proposed effect significantly contributes toward realization of the magnonic devices and also miniaturization of the spintronic devices.

scholarly journals Realization of a Spin-Wave Switch Based on the Spin-Transfer-Torque Effect

2018 ◽  
Vol 9 ◽  
pp. 1-5 ◽  
Author(s):  
Thomas Meyer ◽  
Philipp Pirro ◽  
Thomas Bracher ◽  
Frank Heussner ◽  
Alexander A. Serga ◽  
...  
Keyword(s):  
Spin Wave ◽  
Spin Transfer Torque ◽  
Spin Transfer

Amplification of Spin Waves by Thermal Spin-Transfer Torque

2011 ◽  
Vol 107 (19) ◽  
Author(s):  
E. Padrón-Hernández ◽  
A. Azevedo ◽  
S. M. Rezende
Keyword(s):  
Spin Waves ◽  
Spin Transfer Torque ◽  
Spin Transfer

Micromagnetic simulations of spin-wave normal modes and the spin-transfer-torque driven magnetization dynamics of a ferromagnetic cross

2014 ◽  
Vol 115 (17) ◽  
pp. 17D123 ◽  
Author(s):  
Tanmoy Pramanik ◽  
Urmimala Roy ◽  
Maxim Tsoi ◽  
Leonard F. Register ◽  
Sanjay K. Banerjee
Keyword(s):  
Spin Wave ◽  
Normal Modes ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Magnetization Dynamics ◽  
Micromagnetic Simulations ◽  
Wave Normal

Robust magnetic domains in fluorinated ReS2 monolayer

2015 ◽  
Vol 17 (28) ◽  
pp. 18843-18853 ◽  
Author(s):  
G. C. Loh ◽  
Ravindra Pandey
Keyword(s):  
Spin Wave ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Magnetic Domains ◽  
Spintronic Devices ◽  
Logic Devices ◽  
Gap States

The robust metallic mid-gap states in localized domains of fluorinated ReS2 monolayer could be useful in spintronic devices, such as spin-transfer torque and spin-wave logic devices.

Spin wave modes of two magnetostatic coupled spin transfer torque nano-oscillators

2018 ◽  
Vol 124 (16) ◽  
pp. 162102 ◽  
Author(s):  
D. Mancilla-Almonacid ◽  
R. E. Arias ◽  
R. A. Escobar ◽  
D. Altbir ◽  
S. Allende
Keyword(s):  
Spin Wave ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Wave Modes

scholarly journals Spin-transfer torque induced spin waves in antiferromagnetic insulators

2015 ◽  
Vol 17 (10) ◽  
pp. 103039 ◽  
Author(s):  
Matthew W Daniels ◽  
Wei Guo ◽  
G Malcolm Stocks ◽  
Di Xiao ◽  
Jiang Xiao
Keyword(s):  
Spin Waves ◽  
Spin Transfer Torque ◽  
Spin Transfer

scholarly journals Excitations of incoherent spin-waves due to spin-transfer torque

2004 ◽  
Vol 3 (12) ◽  
pp. 877-881 ◽  
Author(s):  
Kyung-Jin Lee ◽  
Alina Deac ◽  
Olivier Redon ◽  
Jean-Pierre Nozières ◽  
Bernard Dieny
Keyword(s):  
Spin Waves ◽  
Spin Transfer Torque ◽  
Spin Transfer
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