Enhancement of microwave oscillation under angled in-plane magnetic field in ferromagnetic nano-contact spin-valves

2011 ◽  
Vol 99 (9) ◽  
pp. 092507 ◽  
Author(s):  
Hiroaki Suzuki ◽  
Tetsuya Nakamura ◽  
Hiroaki Endo ◽  
Masaaki Doi ◽  
Hiroshi Tsukahara ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Valves ◽  
Microwave Oscillation

scholarly journals Modeling of GMR loops asymmetry in spin valves

2018 ◽  
Vol 185 ◽  
pp. 01011
Author(s):  
Alexander Kurenkov ◽  
Georgy Babaizev ◽  
Nikolay Chechenin
Keyword(s):  
Magnetic Field ◽  
Simple Technique ◽  
Spin Valve ◽  
Hysteresis Loops ◽  
Spin Valves ◽  
Physical Factors ◽  
Regular Shape ◽  
Ferromagnetic Layers ◽  
Insight Into ◽  
Selection Of

The regular shape of the magnetoresistance as a function of applied magnetic field, R(H), is important for numerous spin valves applications. Nevertheless, in many practical studies the shape of the R(H) curve is unpredictably complicated. A simple technique, proposed in this paper, allows interpreting the R(H) features and calculating R(H) curves from known hysteresis loops of ferromagnetic layers, composing spin valves. And vice versa, the shape of the hysteresis loops of the composing ferromagnetic layers can be obtained from R(H) curves.The method does not give an insight into the physical factors determining the shape of hysteresis loops, but it is suitable for prompt selection of promising spin valve stacks. A series of spin valve structures was prepared and their magnetoresistance curves were measured. The analysis of the experimental data demonstrates the capacity of the proposed method.

Improvement of Magnetoresistive Character of NiO/NiFeCo/Cu/NiFeCo Exchange-Biased Spin-Valves Through Annealing in Magnetic Field

1999 ◽  
Vol 16 (1) ◽  
pp. 65-67 ◽  
Author(s):  
Zhi-hong Lu ◽  
Tie Li ◽  
Jin-jun Qiu ◽  
Kun Xun ◽  
Hong-lie Shen ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Valves

Studies of spin related processes in fullerene C60 devices

2018 ◽  
Vol 6 (14) ◽  
pp. 3621-3627 ◽  
Author(s):  
Haoliang Liu ◽  
Jingying Wang ◽  
Matthew Groesbeck ◽  
Xin Pan ◽  
Chuang Zhang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Spin Current ◽  
Fullerene C60 ◽  
Spin Valves ◽  
Pure Spin ◽  
Carrier Injection ◽  
Current Generation ◽  
Spin Polarized

We have investigated spin related processes in fullerene C60 devices using a several experimental techniques, which include magnetic field effect of photocurrent and electroluminescence in C60-based diodes; spin polarized carrier injection in C60-based spin-valves; and pure spin current generation in NiFe/C60/Pt trilayer devices.

scholarly journals Spin Injection and Transport in Organic Materials

Micromachines ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 596
Author(s):  
Qipeng Tian ◽  
Shijie Xie
Keyword(s):  
Magnetic Field ◽  
Organic Molecules ◽  
Organic Materials ◽  
Spin Injection ◽  
Spin Valves ◽  
Magnetic Field Effects ◽  
Field Effects ◽  
Spin Currents ◽  
Organic Spintronics ◽  
Theoretical Progress

This review introduces some important spin phenomena of organic molecules and solids and their devices: Organic spin injection and transport, organic spin valves, organic magnetic field effects, organic excited ferromagnetism, organic spin currents, etc. We summarize the experimental and theoretical progress of organic spintronics in recent years and give prospects.

Sharp Angular Dependence of Free Layer Coercivity in Spin Valves with Ferromagnetic Interlayer Coupling

2014 ◽  
Vol 215 ◽  
pp. 474-479 ◽  
Author(s):  
Larisa I. Naumova ◽  
M.A. Milyaev ◽  
N.G. Bebenin ◽  
Tatyana A. Chernyshova ◽  
Vyacheslav V. Proglyado ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Experimental Data ◽  
Applied Magnetic Field ◽  
Easy Axis ◽  
Sharp Decrease ◽  
Interlayer Coupling ◽  
Spin Valves ◽  
Magnetic Reversal ◽  
Free Layer ◽  
Angle Dependence

The dependence of free layer coercivity on the angle between easy axis and applied magnetic field was studied on [Ta, (Ni80Fe20)60Cr40]/ Ni80Fe20/Co90Fe10/Cu/Co90Fe10/Mn75Ir25/Ta spin valves with various interlayer coupling. Sharp decrease on the angle was observed for ferromagnetically coupled spin valves. The coercivity was reduced down to tenth of Oersted without any decrease of GMR-effect by forming nearly parallel anisotropy configuration. The angles at which the transition from hysteretic to anhysteretic magnetic reversal takes place are detected by analyses of the angle dependence of coercivity. Interpretation of experimental data is based on Stoner-Wohlfarth coherent rotation approach.

Spin-Transfer-Torque Driven Vortex Dynamics in Electrodeposited Nanowire Spin-Valves

SPIN ◽  
2017 ◽  
Vol 07 (01) ◽  
pp. 1740007 ◽  
Author(s):  
Flavio Abreu Araujo ◽  
Luc Piraux
Keyword(s):  
Magnetic Field ◽  
Porous Alumina ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Microwave Emission ◽  
Spin Valves ◽  
Zero Magnetic Field ◽  
Micromagnetic Simulations ◽  
Magnetic Layers ◽  
In Series

A bottom-up approach for the fabrication of an assembly of electrodeposited nanowires has been combined to single nanowire electrical connection techniques to investigate the spin-transfer-torque and microwave emission of specially designed nanowires containing Co/Cu/Co pseudo spin-valves (SVs). Porous alumina templates are used for the growth by electrodeposition of metallic in-series connected SVs. Under specific magnetic field and injected current conditions, emission of microwave current is detected with frequency in the GHz range and linewidth as low as 1.8[Formula: see text]MHz. Microwave signals have been obtained even at zero magnetic field and high frequency versus magnetic field tunability was demonstrated. Our findings are in good agreement with micromagnetic simulations. In addition, it appears that in our particular geometry, the microwave emission is generated by the vortex gyrotropic motion which occurs in, at least, one of the two magnetic layers of our SV structures.

Magnetic-field enhancement of nonlocal spin signal in Ni80Fe20/Ag lateral spin valves

2011 ◽  
Vol 84 (13) ◽  
Author(s):  
G. Mihajlović ◽  
S. I. Erlingsson ◽  
K. Výborný ◽  
J. E. Pearson ◽  
S. D. Bader ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Enhancement ◽  
Spin Valves ◽  
Magnetic Field Enhancement
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