Strain-modulated magnetization precession in skyrmion-based spin transfer nano-oscillator

2021 ◽  
Vol 118 (14) ◽  
pp. 142403
Author(s):  
Guoliang Yu ◽  
Xiaofei Xu ◽  
Yang Qiu ◽  
Han Yang ◽  
Mingmin Zhu ◽  
...  
Keyword(s):  
Spin Transfer ◽  
Magnetization Precession

Magnetization precession by short-wavelength magnon excitations and spin-transfer torque

2018 ◽  
Vol 97 (2) ◽  
Author(s):  
Shizhu Qiao ◽  
Shishen Yan ◽  
Shishou Kang ◽  
Qiang Li ◽  
Yufeng Qin ◽  
...  
Keyword(s):  
Short Wavelength ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Magnetization Precession

scholarly journals Micromagnetic Simulation of Spin Transfer Torque Magnetization Precession Phase Diagram in a Spin-Valve Nanopillar under External Magnetic Fields

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
H. B. Huang ◽  
X. Q. Ma ◽  
Z. H. Liu ◽  
X. M. Shi ◽  
T. Yue ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Magnetic Fields ◽  
Dynamic Balance ◽  
Spin Valve ◽  
Spin Transfer Torque ◽  
Micromagnetic Simulation ◽  
Spin Transfer ◽  
Magnetization Distribution ◽  
Magnetization Precession ◽  
Evolution Behavior

We investigated spin transfer torque magnetization precession in a nanoscale pillar spin-valve under external magnetic fields using micromagnetic simulation. The phase diagram of the magnetization precession is calculated and categorized into four states according to their characteristics. Of the four states, the precessional state has two different modes: steady precession mode and substeady precession mode. The different modes originate from the dynamic balance between the spin transfer torque and the Gilbert damping torque. Furthermore, we reported the behavior of the temporal evolutions of magnetization components in steady precession mode at the condition of the applied magnetic field using the orbit projection method and explaining perfectly the magnetization components evolution behavior. In addition, a result of a nonuniform magnetization distribution is observed in the free layer due to the excitation of non-uniform mode.

Introduction of spin torques

2017 ◽  
Author(s):  
T. Kimura
Keyword(s):  
Angular Momentum ◽  
Giant Magnetoresistance ◽  
Spontaneous Magnetization ◽  
Magnetic Domain ◽  
Magnetic Multilayers ◽  
Transfer Effect ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Angular Momentum ◽  
Spin Torques

This chapter discusses the spin-transfer effect, which is described as the transfer of the spin angular momentum between the conduction electrons and the magnetization of the ferromagnet that occurs due to the conservation of the spin angular momentum. L. Berger, who introduced the concept in 1984, considered the exchange interaction between the conduction electron and the localized magnetic moment, and predicted that a magnetic domain wall can be moved by flowing the spin current. The spin-transfer effect was brought into the limelight by the progress in microfabrication techniques and the discovery of the giant magnetoresistance effect in magnetic multilayers. Berger, at the same time, separately studied the spin-transfer torque in a system similar to Slonczewski’s magnetic multilayered system and predicted spontaneous magnetization precession.

scholarly journals First-Principles Quantum Transport Modeling of Spin-Transfer and Spin-Orbit Torques in Magnetic Multilayers

2018 ◽  
pp. 1-35 ◽  
Author(s):  
Branislav K. Nikolić ◽  
Kapildeb Dolui ◽  
Marko D. Petrović ◽  
Petr Plecháč ◽  
Troels Markussen ◽  
...  
Keyword(s):  
Quantum Transport ◽  
First Principles ◽  
Magnetic Multilayers ◽  
Spin Transfer ◽  
Transport Modeling ◽  
Spin Orbit

Spin transfer effects in current perpendicular to the plane spin valves

2005 ◽  
Vol 287 ◽  
pp. 325-332 ◽  
Author(s):  
M. Covington ◽  
M. AlHajDarwish ◽  
Y. Ding ◽  
A. Rebei ◽  
G.J. Parker ◽  
...  
Keyword(s):  
Spin Transfer ◽  
Spin Valves ◽  
Transfer Effects

scholarly journals Nonclassical Spin Transfer Effects in an Antiferromagnet

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
Alexander Mitrofanov ◽  
Sergei Urazhdin
Keyword(s):  
Spin Transfer ◽  
Transfer Effects

scholarly journals Control of Structural and Magnetic Properties of Polycrystalline Co2FeGe Films via Deposition and Annealing Temperatures

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1229
Author(s):  
Andrii Vovk ◽  
Sergey A. Bunyaev ◽  
Pavel Štrichovanec ◽  
Nikolay R. Vovk ◽  
Bogdan Postolnyi ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Post Deposition Annealing ◽  
Structure Variation ◽  
Annealing Temperatures ◽  
Damping Parameter ◽  
Soft Ferromagnetic ◽  
Thin Polycrystalline ◽  
Post Deposition

Thin polycrystalline Co2FeGe films with composition close to stoichiometry have been fabricated using magnetron co-sputtering technique. Effects of substrate temperature (TS) and post-deposition annealing (Ta) on structure, static and dynamic magnetic properties were systematically studied. It is shown that elevated TS (Ta) promote formation of ordered L21 crystal structure. Variation of TS (Ta) allow modification of magnetic properties in a broad range. Saturation magnetization ~920 emu/cm3 and low magnetization damping parameter α ~ 0.004 were achieved for TS = 573 K. This in combination with soft ferromagnetic properties (coercivity below 6 Oe) makes the films attractive candidates for spin-transfer torque and magnonic devices.

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