Theory of ferromagnetic resonance driven by the combined action of spin-transfer torque and voltage-controlled magnetic anisotropy

2017 ◽  
Vol 96 (17) ◽  
Author(s):  
C. Gonzalez-Fuentes ◽  
C. Garcia ◽  
P. Landeros ◽  
R. A. Gallardo
Keyword(s):  
Magnetic Anisotropy ◽  
Ferromagnetic Resonance ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Combined Action

scholarly journals Current-induced spin–orbit torques

2011 ◽  
Vol 369 (1948) ◽  
pp. 3175-3197 ◽  
Author(s):  
Pietro Gambardella ◽  
Ioan Mihai Miron
Keyword(s):  
Angular Momentum ◽  
Exchange Coupling ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Torque ◽  
Inversion Symmetry ◽  
Spin Orbit ◽  
Great Flexibility ◽  
Combined Action ◽  
Proper Material

The ability to reverse the magnetization of nanomagnets by current injection has attracted increased attention ever since the spin-transfer torque mechanism was predicted in 1996. In this paper, we review the basic theoretical and experimental arguments supporting a novel current-induced spin torque mechanism taking place in ferromagnetic (FM) materials. This effect, hereafter named spin–orbit (SO) torque, is produced by the flow of an electric current in a crystalline structure lacking inversion symmetry, which transfers orbital angular momentum from the lattice to the spin system owing to the combined action of SO and exchange coupling. SO torques are found to be prominent in both FM metal and semiconducting systems, allowing for great flexibility in adjusting their orientation and magnitude by proper material engineering. Further directions of research in this field are briefly outlined.

scholarly journals High Performance MRAM with Spin-Transfer-Torque and Voltage-Controlled Magnetic Anisotropy Effects

2017 ◽  
Vol 7 (9) ◽  
pp. 929 ◽  
Author(s):  
Hao Cai ◽  
Wang Kang ◽  
You Wang ◽  
Lirida Naviner ◽  
Jun Yang ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
High Performance ◽  
Spin Transfer Torque ◽  
Spin Transfer

Perpendicular Magnetic Anisotropy in Amorphous Ferromagnetic CoSiB/Pd Thin-Film Layered Structures

2015 ◽  
Vol 15 (10) ◽  
pp. 8336-8339 ◽  
Author(s):  
Sol Jung ◽  
Haein Yim
Keyword(s):  
Magnetic Anisotropy ◽  
Saturation Magnetization ◽  
Random Access ◽  
Perpendicular Magnetic Anisotropy ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Access Memory ◽  
Magnetic Random Access Memory ◽  
Strong Candidate ◽  
Memory Applications

Spin transfer torque (STT) induced switching of magnetization has led to intriguing and practical possibilities for magnetic random access memory (MRAM). This form of memory, called STT-MRAM, is a strong candidate for future memory applications. This application usually requires a large perpendicular magnetic anisotropy (PMA), large coercivity, and low saturation magnetization. Therefore, we propose an amorphous ferromagnetic CoSiB alloy and investigate CoSiB/Pd multilayer thin films, which have a large PMA, large coercivity, and low saturation magnetization. In this research, we propose a remarkable layered structure that could be a candidate for future applications and try to address a few factors that might affect the variation of PMA, coercivity, and saturation magnetization in the CoSiB/Pd multilayers. We investigate the magnetic properties of the CoSiB/Pd multilayers with various thicknesses of the CoSiB layer. The coercivity was obtained with a maximum of 228 Oe and a minimum value of 91 Oe in the [CoSiB 7 Å/Pd 14 Å]5 and [CoSiB 9 Å/Pd 14 Å]5 multilayers, respectively. The PMA arises from tCoSiB = 3 Å to tCoSiB = 9 Å and disappears after tCoSiB = 9 Å.

Spin transfer torque ferromagnetic resonance induced spin pumping in the Fe/Pd bilayer system

2017 ◽  
Vol 95 (6) ◽  
Author(s):  
A. Kumar ◽  
S. Akansel ◽  
H. Stopfel ◽  
M. Fazlali ◽  
J. Åkerman ◽  
...  
Keyword(s):  
Ferromagnetic Resonance ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Pumping ◽  
Bilayer System

Spin-transfer torque induced domain wall ferromagnetic resonance in nanostrips

2013 ◽  
Vol 332 ◽  
pp. 56-60 ◽  
Author(s):  
Xi-guang Wang ◽  
Guang-hua Guo ◽  
Guang-fu Zhang ◽  
Yao-zhuang Nie ◽  
Qing-lin Xia ◽  
...  
Keyword(s):  
Domain Wall ◽  
Ferromagnetic Resonance ◽  
Spin Transfer Torque ◽  
Spin Transfer
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