High-sensitive hysteresisless spin valve with a composite free layer

2012 ◽  
Vol 113 (4) ◽  
pp. 341-348 ◽  
Author(s):  
V. V. Ustinov ◽  
M. A. Milyaev ◽  
L. I. Naumova ◽  
V. V. Proglyado ◽  
N. S. Bannikova ◽  
...  
Keyword(s):  
Spin Valve ◽  
Free Layer

scholarly journals Noise Characterization of Vortex-State GMR Sensors with Different Free Layer Thicknesses

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 1013
Author(s):  
Herbert Weitensfelder ◽  
Hubert Brueckl ◽  
Armin Satz ◽  
Dieter Suess
Keyword(s):  
Spin Valve ◽  
Low Frequency ◽  
Vortex State ◽  
Frequency Noise ◽  
Free Layer ◽  
Low Frequencies ◽  
Gmr Sensors ◽  
Noise Characterization ◽  
Higher Sensitivity

The spin valve principle is the most prominent sensor design among giant- (GMR) and tunneling (TMR) magnetoresistive sensors. A new sensor concept with a disk shaped free layer enables the formation of a flux-closed vortex magnetization state if a certain relation of thickness to diameter is given. The low frequency noise of current-in-plane GMR sensing elements with different free layer thicknesses at different external field strengths has been measured. The measurements of the 1/f noise in external fields enabled a separation of magnetic and electric noise contributions. It has been shown that while the sensitivity is increasing with a decreasing element thickness, the pink noise contribution is increasing too. Still the detection limit at low frequencies is better in thinner free layer elements due to the higher sensitivity.

Before- and after-domain rotation of the free layer of an FeMn based spin valve

1999 ◽  
Vol 198-199 ◽  
pp. 73-75 ◽  
Author(s):  
J.H. Lee ◽  
B.K. Park ◽  
K. Rhie ◽  
G. Choe ◽  
K.H. Shin
Keyword(s):  
Spin Valve ◽  
Free Layer ◽  
Before And After ◽  
Domain Rotation

scholarly journals Magnetic vortex excitation dependence on the magnetic free layer and size of spin-valve nanocontacts

2011 ◽  
Vol 5 (12) ◽  
pp. 435-437 ◽  
Author(s):  
Moritz Eggeling ◽  
Theodoros Dimopoulos ◽  
Rudolf Heer ◽  
Hubert Brückl
Keyword(s):  
Spin Valve ◽  
Magnetic Vortex ◽  
Free Layer
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