Magnetization configurations of a tri-layer nanopillar ferromagnet/nonmagnetic spacer/ferromagnet

2012 ◽  
Vol 111 (9) ◽  
pp. 093901 ◽  
Author(s):  
Oksana V. Sukhostavets ◽  
Gloria R. Aranda ◽  
Konstantin Y. Guslienko
Keyword(s):  
Nonmagnetic Spacer

Enhancing Frequency and Reducing the Power of Spin-Torque Nanooscillator By The Generated Oersted Field

SPIN ◽  
2020 ◽  
Vol 10 (02) ◽  
pp. 2050012
Author(s):  
H. Bhoomeeswaran ◽  
P. Sabareesan
Keyword(s):  
Spin Valve ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Torque ◽  
Spintronic Devices ◽  
Frequency Tunability ◽  
Spin Polarized ◽  
The Individual ◽  
Promising Source ◽  
Nonmagnetic Spacer

The current-driven magnetization precession dynamics stimulated by Spin-Transfer Torque (STT) in a trilayer spin-valve device (typically Spin-Torque Nanooscillator (STNO)) is numerically investigated by solving the Landau–Lifshitz–Gilbert–Slonczewski (LLGS) equation. We have devised four STNO devices made of ferromagnetic alloys such as CoPt, CoFeB, Fe[Formula: see text]B[Formula: see text]Ni2 and EuO, which act as free and fixed layers. Here, copper acts as a nonmagnetic spacer for all the devices. In this work, we have introduced the current-induced Oersted field, which is generated when a spin-polarized current passes through the device. The generated Oersted field strength is varied by increasing the diameter of the STNO device. Frequency tunability is achieved in all the four devices, whereas the power of the individual device reduces. The frequency and power of the devices depend entirely on the saturation magnetization of the material, which inherently reflects in the current density and the coherence of the spin-polarized DC. In all devices, the frequency increases, whereas the power decreases by increasing the strength of the Oersted field. Among the four devices, the maximum frequency can be tuned up to 104[Formula: see text]GHz with 40[Formula: see text]nm device diameter, which is obtained for EuO material. This opens a promising source and paves a glittering future for the nanoscale spintronic devices.

Investigation of the role of a nonmagnetic spacer in local wall thinning inspection

2018 ◽  
Vol 57 (2) ◽  
pp. 235-245 ◽  
Author(s):  
G. Vértesy ◽  
I. Tomáš ◽  
B. Bálint ◽  
Sz. Gyimóthy ◽  
J. Pávó ◽  
...  
Keyword(s):  
Wall Thinning ◽  
Nonmagnetic Spacer ◽  
Local Wall Thinning

Spin Density Wave in Epitaxial Cr(001)/Sn and Cr(001)/Au Multilayers with Nonmagnetic Spacer Layers

2000 ◽  
Vol 69 (6) ◽  
pp. 1590-1593 ◽  
Author(s):  
Masayasu Takeda ◽  
Ko Mibu ◽  
Koki Takanashi ◽  
Kiyokazu Himi ◽  
Yasuo Endoh ◽  
...  
Keyword(s):  
Spin Density ◽  
Density Wave ◽  
Spin Density Wave ◽  
Nonmagnetic Spacer

scholarly journals Definitive evidence of interlayer coupling betweenGa1−xMnxAslayers separated by a nonmagnetic spacer

2007 ◽  
Vol 76 (20) ◽  
Author(s):  
B. J. Kirby ◽  
J. A. Borchers ◽  
X. Liu ◽  
Z. Ge ◽  
Y. J. Cho ◽  
...  
Keyword(s):  
Interlayer Coupling ◽  
Definitive Evidence ◽  
Nonmagnetic Spacer

Localised modes of elementary excitations in the system of two ferromagnetic layers separated by a nonmagnetic spacer

Vacuum ◽  
2001 ◽  
Vol 63 (1-2) ◽  
pp. 323-329 ◽  
Author(s):  
F.L. Castillo Alvarado ◽  
S. Machowski ◽  
A. Urbaniak-Kucharczyk
Keyword(s):  
Elementary Excitations ◽  
Ferromagnetic Layers ◽  
Nonmagnetic Spacer

Influence of the Thickness of Nonmagnetic Spacer on the Magnetic Properties of Fe/Cu Multilayered Nanowires

2018 ◽  
Vol 787 ◽  
pp. 93-98
Author(s):  
Xi Zhi Wang ◽  
Liang Cai Ma ◽  
Ling Ma ◽  
Xue Ling Lin
Keyword(s):  
Magnetic Properties ◽  
Equilibrium Structure ◽  
Systematic Investigation ◽  
Structure Stability ◽  
Interlayer Exchange Coupling ◽  
One Dimensional ◽  
The Stability ◽  
Interlayer Exchange ◽  
Multilayered Nanowires ◽  
Nonmagnetic Spacer

We present a systematic investigation on the equilibrium structure, stability and magnetic properties of one-dimensional Fe/Cu multilayered nanowires with different width of nonmagnetic Cu spacer using first-principles calculations. The multilayered nanowires preserve their FCC (001) directional lattice symmetry after structural optimization. It is found that the stability of Fe/Cu multilayered nanowires decreases with increasing concentration of nonmagnetic Cu layers. The calculated interlayer exchange coupling (IEC) is found to switch signs as the thickness of nonmagnetic Cu spacer increases in the nanowire, and the magnitude of the IEC value is found to decrease significantly with increasing the number of nonmagnetic Cu layers.

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