Temperature and field dependence of high-frequency magnetic noise in spin valve devices

2003 ◽  
Vol 82 (1) ◽  
pp. 91-93 ◽  
Author(s):  
N. Stutzke ◽  
S. L. Burkett ◽  
S. E. Russek
Keyword(s):  
Field Dependence ◽  
High Frequency ◽  
Spin Valve ◽  
Magnetic Noise

Field dependence of high-frequency magnetic noise in tunneling magnetoresistive heads

2006 ◽  
Vol 100 (6) ◽  
pp. 063912 ◽  
Author(s):  
G. C. Han ◽  
Y. K. Zheng ◽  
Z. Y. Liu ◽  
B. Liu ◽  
S. N. Mao
Keyword(s):  
Field Dependence ◽  
High Frequency ◽  
Magnetic Noise ◽  
Magnetoresistive Heads

Analysis of thermal magnetic noise in spin-valve GMR heads by using micromagnetic simulation

2005 ◽  
Vol 97 (10) ◽  
pp. 10N705 ◽  
Author(s):  
H. Akimoto ◽  
H. Kanai ◽  
Y. Uehara ◽  
T. Ishizuka ◽  
S. Kameyama
Keyword(s):  
Spin Valve ◽  
Micromagnetic Simulation ◽  
Magnetic Noise

Field Dependence of Switching Currents in an Exchange Biased Spin Valve

2007 ◽  
Vol 7 (1) ◽  
pp. 344-349
Author(s):  
Hoang Yen Thi Nguyen ◽  
Sung-Jung Joo ◽  
Kuyoul Jung ◽  
Kyung-Ho Shin
Keyword(s):  
Magnetic Field ◽  
Field Dependence ◽  
Spin Valve ◽  
Spin Transfer Torque ◽  
Information Storage ◽  
Spin Transfer ◽  
Field Range ◽  
Higher Spin ◽  
Thermal Magnetization ◽  
Negative Field

Current induced magnetic reversal due to spin transfer torque is a promising candidate in advanced information storage technology. It has been intensively studied. This work reports the field-dependence of switching-currents for current induced magnetization switching in a uncoupled nano-sized cobalt-based spin valve of exchange biased type. The dependency is investigated in hysteretic regime at room temperature, in comparison with that of a trilayer simple spin valve. In the simple spin valve, the switching currents behave to the positive and the negative applied magnetic field symmetrically. In the exchange biased type, in contrast, the switching currents respond to the negative field in a quite unusual and different manner than to the positive field. A negative magnetic field then can shift the switching-currents into either negative or positive current range, dependently on whether a parallel or an antiparallel state of the spin valve was produced by that field. This different character of switching currents in the negative field range can be explained by the effect of the exchange bias pinning field on the spin-polarizer (the fixed Co layer) of the exchange biased spin valve. That unidirectional pinning filed could suppress the thermal magnetization fluctuation in the spin-polarizer, leading to a higher spin polarization of the current, and hence a lower switching current density than in the simple spin valve.

High-frequency investigations of magnetic noise characteristics

1976 ◽  
Vol 12 (4) ◽  
pp. 406-410 ◽  
Author(s):  
S. Tiitto ◽  
S. Saynajakangas ◽  
R. Rulka
Keyword(s):  
High Frequency ◽  
Magnetic Noise ◽  
Noise Characteristics

High-frequency measurements of spin-valve films and devices (invited)

2003 ◽  
Vol 93 (10) ◽  
pp. 7539-7544 ◽  
Author(s):  
Shehzaad Kaka ◽  
John P. Nibarger ◽  
Stephen E. Russek ◽  
N. A. Stutzke ◽  
S. L. Burkett
Keyword(s):  
High Frequency ◽  
Spin Valve ◽  
Frequency Measurements

Magnetic field dependence of the high-frequency capacitive response of a 2-dimensional electron gas in the quantum hall regime

1996 ◽  
Vol 46 (S5) ◽  
pp. 2459-2460 ◽  
Author(s):  
A. M. C. Valkering ◽  
P. K. H. Sommerfeld ◽  
R. A. M. van de Ven ◽  
R. W. van der Heijden ◽  
F. A. P. Blom
Keyword(s):  
Magnetic Field ◽  
Field Dependence ◽  
High Frequency ◽  
Magnetic Field Dependence ◽  
Electron Gas ◽  
Quantum Hall ◽  
Dimensional Electron ◽  
Quantum Hall Regime ◽  
Hall Regime ◽  
Dimensional Electron Gas

Thermal magnetic noise and spectra in spin valve heads

2002 ◽  
Vol 91 (10) ◽  
pp. 7273 ◽  
Author(s):  
Jian-Gang Zhu
Keyword(s):  
Spin Valve ◽  
Magnetic Noise
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