scholarly journals Vortex Induced by DC Current in a Circular Magnetic Spin Valve Nanopillar

2012 ◽  
Vol 48 (4) ◽  
pp. 1297-1300 ◽  
Author(s):  
L. J. Chang ◽  
Pang Lin ◽  
Shang Fan Lee
Keyword(s):  
Spin Valve ◽  
Magnetic Spin ◽  
Dc Current

Magnetic Spin Valve Sensors with Different Geometry to Magnetic Bead Detection for Biosensor Application

2007 ◽  
Vol 1032 ◽  
Author(s):  
Jeong Dae Suh ◽  
Myung Ae Chung
Keyword(s):  
Magnetic Beads ◽  
Spin Valve ◽  
Magnetic Bead ◽  
Highly Sensitive ◽  
Magnetic Spin ◽  
Biosensor Application ◽  
Detection Of Biomolecules ◽  
Meander Line ◽  
Cross Type ◽  
Line Type

AbstractWe have demonstrated the use of highly sensitive spin valve sensors for the detection of micron magnetic beads. By using a ring type, cross type, and meander line type sensors, we were able to detect the presence of 2.8 μm size magnetic beads in real time by direct measurement of magnetic dipole fields from magnetic beads. The sensitivity of the ring, cross and meander line sensors were obtained about 50 μV/Oe, 7 μV/Oe, 30 μV/Oe and sensor output signals of 50 μV , 30 μV, 90 μV were obtained in an external applied field of 10 Oe and 1 mA sense current. Our results shows that ring, cross, and meander line shape spin valve sensors are very promising candidates for the detection of biomolecules with magnetic labels.

Coherent and incoherent spin torque oscillations in a nanopillar magnetic spin-valve

2013 ◽  
Vol 102 (25) ◽  
pp. 252402 ◽  
Author(s):  
P. M. Braganca ◽  
O. J. Lee ◽  
O. Ozatay ◽  
L. Liu ◽  
G. Finocchio ◽  
...  
Keyword(s):  
Spin Valve ◽  
Spin Torque ◽  
Magnetic Spin

Modified High Frequency Radial Spin Wave Mode Spectrum in a Chirality-Controlled Nanopillar

SPIN ◽  
2016 ◽  
Vol 06 (03) ◽  
pp. 1650008
Author(s):  
J. E. Kolthammer ◽  
J. Rudge ◽  
B. C. Choi ◽  
Y. K. Hong
Keyword(s):  
Spin Wave ◽  
Spin Valve ◽  
Wave Mode ◽  
Spin Transfer Torque ◽  
Free Layer ◽  
Micromagnetic Simulations ◽  
Mode Spectrum ◽  
Spin Wave Mode ◽  
Magnetic Spin ◽  
Chirality Control

Circular magnetic spin valve nanopillars in a dual vortex configuration have dynamic characteristics strongly dependent on the interlayer dipole coupling. We report here on frequency domain properties of such nanopillars obtained by micromagnetic simulations. After the free layer is chirality switched with spin transfer torque, a radial spin wave eigenmode spectrum forms in the free layer with unusually large edge amplitude. The structure of these modes indicate a departure from the magnetostatic processes typically observed experimentally and treated analytically in low aspect ratio isolated disks. Our findings give new details of dynamic chirality control and relxation in nanopillars and raise potential signatures for experiments.

High frequency magnetic eigen excitations in a spin valve submitted to CPP DC current

2006 ◽  
Vol 126 (2-3) ◽  
pp. 267-270 ◽  
Author(s):  
Q. Mistral ◽  
A. Deac ◽  
J. Grollier ◽  
O. Redon ◽  
Y. Liu ◽  
...  
Keyword(s):  
High Frequency ◽  
Spin Valve ◽  
Dc Current

The Investigation of Long-Range Exchange Interaction in Spin Valve Structures

2014 ◽  
Vol 215 ◽  
pp. 489-494
Author(s):  
Petr D. Kim ◽  
Gennady S. Patrin ◽  
Igor A. Turpanov ◽  
Dmitriy A. Marushchenko ◽  
L.A. Lee ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Exchange Interaction ◽  
Long Range ◽  
Spin Valve ◽  
Random Access ◽  
Practical Interest ◽  
Hard Disk ◽  
Theoretical Work ◽  
Magnetic Spin ◽  
Great Practical Interest

Magnetic spin valve structures have a great practical interest as sensors of magnetic fields, hard disk read heads and elements of magnetic random access memories (MRAM). Despite the large number of experimental and theoretical work on spin valve structures, the effects of interlayer interactions occurring in these structures, at present time are not fully understood. Introduction

Electromigration Reliability Study of a GMR Spin Valve Device

1999 ◽  
Vol 563 ◽  
Author(s):  
S. Shingubara ◽  
Y. Takeda ◽  
H. Sakue ◽  
T. Takahagi ◽  
A. H. Verbruggen
Keyword(s):  
Thermal Gradient ◽  
Elevated Temperatures ◽  
Spin Valve ◽  
Ferromagnetic Layer ◽  
Magnetization Vector ◽  
Atomic Diffusion ◽  
Thermal Probe ◽  
Reliability Study ◽  
Current Densities ◽  
Dc Current

AbstractElectromigration reliability of a GMR spin valve device has been investigated at elevated temperatures at various DC current densities. Significant degradation of the magnetoresistance was observed when the current density was higher than 20 MA/cm2. Either the electromigration induced damage or the rotation of the magnetization vector of the Mnlr anti-ferromagnetic layer are possible mechanisms of degradation. Furthermore, significant voiding caused by electromigration and thermal gradient induced atomic motion was observed at current densities higher than 35 MA/cm2. High-resolution temperature distribution measurements by scanning thermal probe microscopy revealed the existence of a huge temperature gradient of 106°C/cm, which is a strong driving force for atomic diffusion.

Manipulation of magnetic particles by patterned arrays of magnetic spin-valve traps

2007 ◽  
Vol 311 (1) ◽  
pp. 401-404 ◽  
Author(s):  
Elizabeth Mirowski ◽  
John Moreland ◽  
Stephen Russek ◽  
Michael Donahue ◽  
Kuangwen Hsieh
Keyword(s):  
Magnetic Particles ◽  
Spin Valve ◽  
Magnetic Spin

JOSEPHSON-LIKE EFFECT IN A SPIN VALVE

2002 ◽  
Vol 16 (19) ◽  
pp. 711-720 ◽  
Author(s):  
GANG SU ◽  
MASUO SUZUKI
Keyword(s):  
Bias Voltage ◽  
Josephson Effect ◽  
Spin Valve ◽  
Tunneling Current ◽  
Tunneling Junction ◽  
Current Component ◽  
Resonant Condition ◽  
Insulating Layer ◽  
Valve System ◽  
Dc Current

The possibility of the Josephson-like effect in a spin valve system is discussed. It is argued that in the absence of the bias voltage, the system can have dc currents flowing through the tunneling junction under certain conditions when alignments of spins in two ferromagnetic (FM) layers separated by an insulating layer, are parallel. The system may have ac currents flowing through the junction when spins in the two FM layers are tilting aligned or antialigned, this being a result quite different from the Josephson effect in superconducting junctions. In the presence of the bias voltage, the tunneling current is, in general, alternating, but for the case of antialigned spins, it contains a dc current component when the bias voltage takes a specific value (a resonant condition). The case with an ac bias voltage is also addressed.

The Annealing Effect of Spin-Valve-Like Ferromagnetic Tunnel Junction

1999 ◽  
Vol 23 (1_2) ◽  
pp. 49-51 ◽  
Author(s):  
H. Kikuchi ◽  
K. Kobayashi ◽  
M. Sato
Keyword(s):  
Tunnel Junction ◽  
Spin Valve ◽  
Annealing Effect
Sign in / Sign up

Export Citation Format

Share Document